/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_unwindbound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 22:21:23,403 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 22:21:23,405 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 22:21:23,433 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 22:21:23,434 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 22:21:23,437 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 22:21:23,440 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 22:21:23,448 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 22:21:23,450 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 22:21:23,456 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 22:21:23,456 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 22:21:23,457 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 22:21:23,457 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 22:21:23,458 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 22:21:23,459 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 22:21:23,460 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 22:21:23,460 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 22:21:23,461 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 22:21:23,462 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 22:21:23,463 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 22:21:23,464 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 22:21:23,467 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 22:21:23,471 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 22:21:23,473 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 22:21:23,481 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 22:21:23,491 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 22:21:23,491 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 22:21:23,492 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 22:21:23,496 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 22:21:23,509 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 22:21:23,509 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 22:21:23,510 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 22:21:23,510 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 22:21:23,510 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 22:21:23,510 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 22:21:23,510 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 22:21:23,511 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 22:21:23,511 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 22:21:23,511 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 22:21:23,511 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 22:21:23,511 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 22:21:23,511 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 22:21:23,511 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 22:21:23,512 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 22:21:23,512 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 22:21:23,512 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 22:21:23,512 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 22:21:23,512 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 22:21:23,512 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 22:21:23,513 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 22:21:23,513 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 22:21:23,513 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 22:21:23,783 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 22:21:23,800 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 22:21:23,802 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 22:21:23,803 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 22:21:23,803 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 22:21:23,804 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_unwindbound50.c [2021-05-02 22:21:23,852 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/37e2cb307/675fda9d40c74c7cae72142a0f119c45/FLAG1bedd720a [2021-05-02 22:21:24,234 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 22:21:24,234 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_unwindbound50.c [2021-05-02 22:21:24,239 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/37e2cb307/675fda9d40c74c7cae72142a0f119c45/FLAG1bedd720a [2021-05-02 22:21:24,254 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/37e2cb307/675fda9d40c74c7cae72142a0f119c45 [2021-05-02 22:21:24,256 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 22:21:24,259 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 22:21:24,260 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 22:21:24,261 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 22:21:24,267 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 22:21:24,267 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 10:21:24" (1/1) ... [2021-05-02 22:21:24,268 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5675c9ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:21:24, skipping insertion in model container [2021-05-02 22:21:24,268 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 10:21:24" (1/1) ... [2021-05-02 22:21:24,274 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 22:21:24,290 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 22:21:24,384 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_unwindbound50.c[458,471] [2021-05-02 22:21:24,395 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 22:21:24,401 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 22:21:24,414 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_unwindbound50.c[458,471] [2021-05-02 22:21:24,433 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 22:21:24,446 INFO L208 MainTranslator]: Completed translation [2021-05-02 22:21:24,447 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:21:24 WrapperNode [2021-05-02 22:21:24,447 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 22:21:24,449 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 22:21:24,449 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 22:21:24,449 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 22:21:24,467 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:21:24" (1/1) ... [2021-05-02 22:21:24,468 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:21:24" (1/1) ... [2021-05-02 22:21:24,473 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:21:24" (1/1) ... [2021-05-02 22:21:24,473 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:21:24" (1/1) ... [2021-05-02 22:21:24,491 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:21:24" (1/1) ... [2021-05-02 22:21:24,494 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:21:24" (1/1) ... [2021-05-02 22:21:24,495 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:21:24" (1/1) ... [2021-05-02 22:21:24,499 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 22:21:24,501 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 22:21:24,501 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 22:21:24,501 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 22:21:24,510 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:21:24" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 22:21:24,575 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 22:21:24,575 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 22:21:24,575 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 22:21:24,575 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 22:21:24,576 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 22:21:24,576 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 22:21:24,576 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 22:21:24,576 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 22:21:24,576 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 22:21:24,577 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 22:21:24,577 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2021-05-02 22:21:24,577 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 22:21:24,577 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 22:21:24,577 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 22:21:24,578 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 22:21:24,578 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 22:21:24,578 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 22:21:24,578 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 22:21:24,579 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 22:21:24,579 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 22:21:24,754 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 22:21:24,755 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 22:21:24,756 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 10:21:24 BoogieIcfgContainer [2021-05-02 22:21:24,756 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 22:21:24,757 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 22:21:24,757 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 22:21:24,757 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 22:21:24,759 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 10:21:24" (1/1) ... [2021-05-02 22:21:24,782 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 10:21:24 BasicIcfg [2021-05-02 22:21:24,782 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 22:21:24,783 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 22:21:24,783 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 22:21:24,805 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 22:21:24,806 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 10:21:24" (1/4) ... [2021-05-02 22:21:24,806 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3452ba46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 10:21:24, skipping insertion in model container [2021-05-02 22:21:24,806 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:21:24" (2/4) ... [2021-05-02 22:21:24,807 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3452ba46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 10:21:24, skipping insertion in model container [2021-05-02 22:21:24,807 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 10:21:24" (3/4) ... [2021-05-02 22:21:24,807 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3452ba46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 10:21:24, skipping insertion in model container [2021-05-02 22:21:24,807 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 10:21:24" (4/4) ... [2021-05-02 22:21:24,808 INFO L111 eAbstractionObserver]: Analyzing ICFG ps4-ll_unwindbound50.cJordan [2021-05-02 22:21:24,812 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 22:21:24,815 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 22:21:24,828 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 22:21:24,867 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 22:21:24,868 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 22:21:24,868 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 22:21:24,868 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 22:21:24,868 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 22:21:24,868 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 22:21:24,868 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 22:21:24,868 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 22:21:24,893 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 22:21:24,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-02 22:21:24,898 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:21:24,899 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:21:24,899 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:21:24,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:21:24,903 INFO L82 PathProgramCache]: Analyzing trace with hash 1984627219, now seen corresponding path program 1 times [2021-05-02 22:21:24,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:21:24,914 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262518614] [2021-05-02 22:21:24,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:21:25,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:21:25,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 22:21:25,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:21:25,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 22:21:25,158 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:21:25,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262518614] [2021-05-02 22:21:25,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262518614] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 22:21:25,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 22:21:25,159 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 22:21:25,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787929719] [2021-05-02 22:21:25,164 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 22:21:25,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:21:25,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 22:21:25,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 22:21:25,180 INFO L87 Difference]: Start difference. First operand has 23 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 22:21:25,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:21:25,253 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2021-05-02 22:21:25,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 22:21:25,255 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-05-02 22:21:25,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:21:25,260 INFO L225 Difference]: With dead ends: 24 [2021-05-02 22:21:25,260 INFO L226 Difference]: Without dead ends: 19 [2021-05-02 22:21:25,261 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 51.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 22:21:25,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-05-02 22:21:25,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2021-05-02 22:21:25,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 22:21:25,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2021-05-02 22:21:25,289 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 11 [2021-05-02 22:21:25,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:21:25,290 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2021-05-02 22:21:25,290 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 22:21:25,290 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2021-05-02 22:21:25,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 22:21:25,291 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:21:25,291 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:21:25,291 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 22:21:25,291 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:21:25,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:21:25,292 INFO L82 PathProgramCache]: Analyzing trace with hash 1423332195, now seen corresponding path program 1 times [2021-05-02 22:21:25,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:21:25,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143804059] [2021-05-02 22:21:25,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:21:25,322 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:21:25,323 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [625851223] [2021-05-02 22:21:25,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:21:25,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:21:25,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 22:21:25,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:21:25,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:25,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:25,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:25,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:25,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:25,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 22:21:25,497 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:21:25,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143804059] [2021-05-02 22:21:25,498 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:21:25,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625851223] [2021-05-02 22:21:25,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625851223] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 22:21:25,498 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 22:21:25,498 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 22:21:25,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464920628] [2021-05-02 22:21:25,500 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 22:21:25,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:21:25,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 22:21:25,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 22:21:25,502 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 22:21:25,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:21:25,516 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2021-05-02 22:21:25,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 22:21:25,517 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-02 22:21:25,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:21:25,518 INFO L225 Difference]: With dead ends: 20 [2021-05-02 22:21:25,518 INFO L226 Difference]: Without dead ends: 20 [2021-05-02 22:21:25,519 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.2ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 22:21:25,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-05-02 22:21:25,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-05-02 22:21:25,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 22:21:25,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2021-05-02 22:21:25,530 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 12 [2021-05-02 22:21:25,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:21:25,531 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2021-05-02 22:21:25,532 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 22:21:25,532 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2021-05-02 22:21:25,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 22:21:25,532 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:21:25,537 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:21:25,759 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 22:21:25,759 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:21:25,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:21:25,760 INFO L82 PathProgramCache]: Analyzing trace with hash 1424404671, now seen corresponding path program 1 times [2021-05-02 22:21:25,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:21:25,760 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791647796] [2021-05-02 22:21:25,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:21:25,776 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:21:25,776 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [638014845] [2021-05-02 22:21:25,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:21:25,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:21:25,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-02 22:21:25,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:21:25,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 22:21:25,886 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:21:25,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791647796] [2021-05-02 22:21:25,886 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:21:25,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638014845] [2021-05-02 22:21:25,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638014845] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 22:21:25,887 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 22:21:25,887 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 22:21:25,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686461654] [2021-05-02 22:21:25,887 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 22:21:25,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:21:25,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 22:21:25,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-02 22:21:25,888 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 22:21:25,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:21:25,927 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2021-05-02 22:21:25,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 22:21:25,928 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-02 22:21:25,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:21:25,929 INFO L225 Difference]: With dead ends: 28 [2021-05-02 22:21:25,929 INFO L226 Difference]: Without dead ends: 26 [2021-05-02 22:21:25,929 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.0ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-02 22:21:25,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-02 22:21:25,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-05-02 22:21:25,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 22:21:25,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2021-05-02 22:21:25,939 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 12 [2021-05-02 22:21:25,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:21:25,940 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2021-05-02 22:21:25,940 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 22:21:25,940 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2021-05-02 22:21:25,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-02 22:21:25,941 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:21:25,941 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:21:26,156 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:21:26,157 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:21:26,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:21:26,158 INFO L82 PathProgramCache]: Analyzing trace with hash -381498108, now seen corresponding path program 1 times [2021-05-02 22:21:26,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:21:26,158 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748908251] [2021-05-02 22:21:26,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:21:26,166 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:21:26,166 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1790801371] [2021-05-02 22:21:26,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:21:26,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:21:26,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 22:21:26,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:21:26,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:26,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:26,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:26,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:26,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:26,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:26,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:26,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:26,313 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 22:21:26,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:21:26,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748908251] [2021-05-02 22:21:26,314 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:21:26,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790801371] [2021-05-02 22:21:26,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790801371] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:21:26,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:21:26,314 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-02 22:21:26,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509181710] [2021-05-02 22:21:26,315 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 22:21:26,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:21:26,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 22:21:26,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 22:21:26,316 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 22:21:26,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:21:26,348 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2021-05-02 22:21:26,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 22:21:26,349 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2021-05-02 22:21:26,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:21:26,350 INFO L225 Difference]: With dead ends: 28 [2021-05-02 22:21:26,350 INFO L226 Difference]: Without dead ends: 28 [2021-05-02 22:21:26,352 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 13.9ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 22:21:26,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-05-02 22:21:26,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-05-02 22:21:26,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 22:21:26,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2021-05-02 22:21:26,359 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 20 [2021-05-02 22:21:26,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:21:26,360 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2021-05-02 22:21:26,360 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 22:21:26,360 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2021-05-02 22:21:26,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-02 22:21:26,360 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:21:26,361 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:21:26,582 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:21:26,583 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:21:26,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:21:26,584 INFO L82 PathProgramCache]: Analyzing trace with hash -380425632, now seen corresponding path program 1 times [2021-05-02 22:21:26,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:21:26,584 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119629222] [2021-05-02 22:21:26,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:21:26,592 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:21:26,592 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1397853731] [2021-05-02 22:21:26,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:21:26,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:21:26,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 22:21:26,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:21:26,735 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 22:21:26,735 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:21:26,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119629222] [2021-05-02 22:21:26,735 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:21:26,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397853731] [2021-05-02 22:21:26,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397853731] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:21:26,736 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:21:26,736 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 22:21:26,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595957471] [2021-05-02 22:21:26,736 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 22:21:26,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:21:26,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 22:21:26,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 22:21:26,737 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 22:21:28,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:21:28,829 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2021-05-02 22:21:28,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 22:21:28,829 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2021-05-02 22:21:28,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:21:28,830 INFO L225 Difference]: With dead ends: 36 [2021-05-02 22:21:28,830 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 22:21:28,831 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 43.3ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-02 22:21:28,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 22:21:28,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-02 22:21:28,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 24 states have internal predecessors, (26), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 22:21:28,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2021-05-02 22:21:28,834 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 20 [2021-05-02 22:21:28,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:21:28,834 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2021-05-02 22:21:28,834 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 22:21:28,835 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2021-05-02 22:21:28,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-02 22:21:28,835 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:21:28,835 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:21:29,044 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:21:29,045 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:21:29,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:21:29,045 INFO L82 PathProgramCache]: Analyzing trace with hash 1647871298, now seen corresponding path program 1 times [2021-05-02 22:21:29,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:21:29,046 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328727313] [2021-05-02 22:21:29,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:21:29,053 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:21:29,054 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1825911507] [2021-05-02 22:21:29,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:21:29,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:21:29,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-02 22:21:29,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:21:29,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:29,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:29,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:29,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:29,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:29,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:29,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:29,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:29,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:29,274 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 22:21:29,274 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:21:29,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328727313] [2021-05-02 22:21:29,274 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:21:29,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825911507] [2021-05-02 22:21:29,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825911507] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:21:29,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:21:29,275 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 22:21:29,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076423485] [2021-05-02 22:21:29,275 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 22:21:29,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:21:29,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 22:21:29,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-02 22:21:29,276 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 9 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 22:21:29,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:21:29,366 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2021-05-02 22:21:29,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 22:21:29,366 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 26 [2021-05-02 22:21:29,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:21:29,367 INFO L225 Difference]: With dead ends: 39 [2021-05-02 22:21:29,367 INFO L226 Difference]: Without dead ends: 34 [2021-05-02 22:21:29,367 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 73.9ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-02 22:21:29,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-02 22:21:29,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-05-02 22:21:29,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 22:21:29,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2021-05-02 22:21:29,371 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 26 [2021-05-02 22:21:29,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:21:29,371 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2021-05-02 22:21:29,371 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 22:21:29,371 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2021-05-02 22:21:29,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 22:21:29,372 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:21:29,372 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:21:29,588 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 22:21:29,589 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:21:29,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:21:29,589 INFO L82 PathProgramCache]: Analyzing trace with hash -382724699, now seen corresponding path program 2 times [2021-05-02 22:21:29,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:21:29,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165297348] [2021-05-02 22:21:29,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:21:29,597 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:21:29,598 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1544198409] [2021-05-02 22:21:29,598 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:21:29,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 22:21:29,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:21:29,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 22:21:29,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:21:29,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:29,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:29,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:29,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:29,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:29,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:29,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:29,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:29,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:29,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:29,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:29,726 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 22:21:29,726 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:21:29,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165297348] [2021-05-02 22:21:29,726 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:21:29,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544198409] [2021-05-02 22:21:29,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544198409] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:21:29,727 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:21:29,727 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 22:21:29,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793867113] [2021-05-02 22:21:29,727 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 22:21:29,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:21:29,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 22:21:29,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 22:21:29,728 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 22:21:29,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:21:29,768 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2021-05-02 22:21:29,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 22:21:29,769 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2021-05-02 22:21:29,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:21:29,769 INFO L225 Difference]: With dead ends: 36 [2021-05-02 22:21:29,769 INFO L226 Difference]: Without dead ends: 36 [2021-05-02 22:21:29,770 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 26.6ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-02 22:21:29,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-02 22:21:29,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-05-02 22:21:29,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 24 states have (on average 1.125) internal successors, (27), 25 states have internal predecessors, (27), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 22:21:29,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2021-05-02 22:21:29,773 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 28 [2021-05-02 22:21:29,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:21:29,774 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2021-05-02 22:21:29,774 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 22:21:29,774 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2021-05-02 22:21:29,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 22:21:29,774 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:21:29,774 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:21:29,981 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:21:29,981 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:21:29,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:21:29,989 INFO L82 PathProgramCache]: Analyzing trace with hash -381652223, now seen corresponding path program 2 times [2021-05-02 22:21:29,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:21:29,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975621306] [2021-05-02 22:21:29,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:21:29,996 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:21:29,996 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [324626555] [2021-05-02 22:21:29,996 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:21:30,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 22:21:30,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:21:30,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-02 22:21:30,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:21:30,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:30,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:30,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:30,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:30,263 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 22:21:30,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:21:30,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975621306] [2021-05-02 22:21:30,263 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:21:30,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324626555] [2021-05-02 22:21:30,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324626555] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:21:30,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:21:30,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 22:21:30,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365131903] [2021-05-02 22:21:30,265 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 22:21:30,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:21:30,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 22:21:30,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-02 22:21:30,266 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 22:21:30,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:21:30,377 INFO L93 Difference]: Finished difference Result 44 states and 49 transitions. [2021-05-02 22:21:30,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 22:21:30,378 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2021-05-02 22:21:30,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:21:30,379 INFO L225 Difference]: With dead ends: 44 [2021-05-02 22:21:30,379 INFO L226 Difference]: Without dead ends: 43 [2021-05-02 22:21:30,379 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 110.3ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-02 22:21:30,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-02 22:21:30,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-05-02 22:21:30,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 30 states have internal predecessors, (32), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 22:21:30,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2021-05-02 22:21:30,384 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 28 [2021-05-02 22:21:30,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:21:30,384 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2021-05-02 22:21:30,384 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 22:21:30,384 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2021-05-02 22:21:30,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-02 22:21:30,385 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:21:30,385 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:21:30,598 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:21:30,598 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:21:30,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:21:30,598 INFO L82 PathProgramCache]: Analyzing trace with hash 31133987, now seen corresponding path program 2 times [2021-05-02 22:21:30,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:21:30,599 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794738748] [2021-05-02 22:21:30,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:21:30,604 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:21:30,604 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1878178786] [2021-05-02 22:21:30,604 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:21:30,692 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 22:21:30,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:21:30,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-02 22:21:30,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:21:30,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:30,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:30,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:30,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:30,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:30,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:30,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:30,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:30,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:30,850 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-02 22:21:30,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:21:30,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794738748] [2021-05-02 22:21:30,851 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:21:30,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878178786] [2021-05-02 22:21:30,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878178786] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:21:30,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:21:30,851 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 22:21:30,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677799955] [2021-05-02 22:21:30,851 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 22:21:30,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:21:30,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 22:21:30,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-05-02 22:21:30,852 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 22:21:30,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:21:30,985 INFO L93 Difference]: Finished difference Result 47 states and 50 transitions. [2021-05-02 22:21:30,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 22:21:30,986 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 34 [2021-05-02 22:21:30,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:21:30,986 INFO L225 Difference]: With dead ends: 47 [2021-05-02 22:21:30,987 INFO L226 Difference]: Without dead ends: 42 [2021-05-02 22:21:30,987 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 104.6ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-02 22:21:30,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-05-02 22:21:30,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-05-02 22:21:30,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 29 states have internal predecessors, (31), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 22:21:30,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2021-05-02 22:21:30,991 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 34 [2021-05-02 22:21:30,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:21:30,991 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2021-05-02 22:21:30,991 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 22:21:30,991 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2021-05-02 22:21:30,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 22:21:30,992 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:21:30,992 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:21:31,198 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-02 22:21:31,198 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:21:31,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:21:31,199 INFO L82 PathProgramCache]: Analyzing trace with hash 710880582, now seen corresponding path program 3 times [2021-05-02 22:21:31,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:21:31,199 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344815254] [2021-05-02 22:21:31,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:21:31,204 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:21:31,204 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1228388219] [2021-05-02 22:21:31,204 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:21:31,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 22:21:31,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:21:31,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-02 22:21:31,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:21:31,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:31,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:31,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:31,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:31,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:31,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:31,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:31,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:31,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:31,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:31,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:31,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:31,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:31,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:31,399 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 22:21:31,399 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:21:31,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344815254] [2021-05-02 22:21:31,399 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:21:31,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228388219] [2021-05-02 22:21:31,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228388219] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:21:31,399 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:21:31,399 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 22:21:31,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833106147] [2021-05-02 22:21:31,400 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 22:21:31,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:21:31,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 22:21:31,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 22:21:31,401 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 22:21:31,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:21:31,464 INFO L93 Difference]: Finished difference Result 44 states and 47 transitions. [2021-05-02 22:21:31,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 22:21:31,465 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 36 [2021-05-02 22:21:31,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:21:31,465 INFO L225 Difference]: With dead ends: 44 [2021-05-02 22:21:31,465 INFO L226 Difference]: Without dead ends: 44 [2021-05-02 22:21:31,466 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 45.3ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-05-02 22:21:31,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-02 22:21:31,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-05-02 22:21:31,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 30 states have (on average 1.1) internal successors, (33), 31 states have internal predecessors, (33), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 22:21:31,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2021-05-02 22:21:31,469 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 36 [2021-05-02 22:21:31,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:21:31,469 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2021-05-02 22:21:31,469 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 22:21:31,469 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2021-05-02 22:21:31,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 22:21:31,470 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:21:31,470 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:21:31,688 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:21:31,689 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:21:31,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:21:31,689 INFO L82 PathProgramCache]: Analyzing trace with hash 711953058, now seen corresponding path program 3 times [2021-05-02 22:21:31,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:21:31,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394912761] [2021-05-02 22:21:31,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:21:31,695 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:21:31,695 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2016949698] [2021-05-02 22:21:31,695 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:21:31,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-02 22:21:31,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:21:31,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 22:21:31,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:21:31,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:31,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:31,867 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 22:21:31,867 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:21:31,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394912761] [2021-05-02 22:21:31,868 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:21:31,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016949698] [2021-05-02 22:21:31,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016949698] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:21:31,868 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:21:31,868 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 22:21:31,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011227472] [2021-05-02 22:21:31,869 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 22:21:31,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:21:31,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 22:21:31,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-02 22:21:31,870 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-02 22:21:31,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:21:31,922 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2021-05-02 22:21:31,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 22:21:31,923 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 36 [2021-05-02 22:21:31,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:21:31,925 INFO L225 Difference]: With dead ends: 48 [2021-05-02 22:21:31,925 INFO L226 Difference]: Without dead ends: 45 [2021-05-02 22:21:31,925 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 43.8ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-02 22:21:31,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-02 22:21:31,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-05-02 22:21:31,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 32 states have (on average 1.0625) internal successors, (34), 32 states have internal predecessors, (34), 7 states have call successors, (7), 7 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 22:21:31,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2021-05-02 22:21:31,939 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 36 [2021-05-02 22:21:31,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:21:31,940 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2021-05-02 22:21:31,940 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-02 22:21:31,940 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2021-05-02 22:21:31,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-02 22:21:31,941 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:21:31,941 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:21:32,141 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:21:32,142 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:21:32,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:21:32,142 INFO L82 PathProgramCache]: Analyzing trace with hash 1474833412, now seen corresponding path program 3 times [2021-05-02 22:21:32,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:21:32,142 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373157053] [2021-05-02 22:21:32,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:21:32,149 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:21:32,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [236299757] [2021-05-02 22:21:32,150 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:21:32,429 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 22:21:32,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:21:32,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 22:21:32,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:21:32,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:32,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:32,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:32,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:32,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:32,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:32,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:32,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:32,573 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 8 proven. 24 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-02 22:21:32,573 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:21:32,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373157053] [2021-05-02 22:21:32,573 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:21:32,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236299757] [2021-05-02 22:21:32,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236299757] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:21:32,574 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:21:32,574 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 22:21:32,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041196111] [2021-05-02 22:21:32,574 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 22:21:32,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:21:32,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 22:21:32,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-05-02 22:21:32,575 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 22:21:32,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:21:32,656 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2021-05-02 22:21:32,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 22:21:32,656 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 42 [2021-05-02 22:21:32,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:21:32,657 INFO L225 Difference]: With dead ends: 50 [2021-05-02 22:21:32,657 INFO L226 Difference]: Without dead ends: 47 [2021-05-02 22:21:32,657 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 79.1ms TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-02 22:21:32,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-05-02 22:21:32,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-05-02 22:21:32,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 33 states have internal predecessors, (35), 8 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 22:21:32,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2021-05-02 22:21:32,660 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 42 [2021-05-02 22:21:32,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:21:32,660 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2021-05-02 22:21:32,660 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 22:21:32,660 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2021-05-02 22:21:32,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-02 22:21:32,661 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:21:32,661 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:21:32,865 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-02 22:21:32,865 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:21:32,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:21:32,865 INFO L82 PathProgramCache]: Analyzing trace with hash 831591399, now seen corresponding path program 4 times [2021-05-02 22:21:32,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:21:32,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538875876] [2021-05-02 22:21:32,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:21:32,871 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:21:32,871 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [8513422] [2021-05-02 22:21:32,871 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:21:32,932 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 22:21:32,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:21:32,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-02 22:21:32,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:21:32,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:32,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:32,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:32,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:32,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:32,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:32,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:32,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:32,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:32,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:32,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:32,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:33,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:33,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:33,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:33,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:33,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:33,072 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 22:21:33,072 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:21:33,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538875876] [2021-05-02 22:21:33,072 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:21:33,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8513422] [2021-05-02 22:21:33,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8513422] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:21:33,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:21:33,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 22:21:33,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771990417] [2021-05-02 22:21:33,073 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 22:21:33,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:21:33,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 22:21:33,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-02 22:21:33,074 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 7 states have call successors, (7), 7 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 22:21:33,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:21:33,153 INFO L93 Difference]: Finished difference Result 53 states and 54 transitions. [2021-05-02 22:21:33,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 22:21:33,154 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 7 states have call successors, (7), 7 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 44 [2021-05-02 22:21:33,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:21:33,154 INFO L225 Difference]: With dead ends: 53 [2021-05-02 22:21:33,154 INFO L226 Difference]: Without dead ends: 53 [2021-05-02 22:21:33,155 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 54.6ms TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-05-02 22:21:33,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-05-02 22:21:33,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-05-02 22:21:33,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 38 states have (on average 1.0526315789473684) internal successors, (40), 38 states have internal predecessors, (40), 8 states have call successors, (8), 8 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 22:21:33,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2021-05-02 22:21:33,158 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 44 [2021-05-02 22:21:33,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:21:33,158 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2021-05-02 22:21:33,158 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 7 states have call successors, (7), 7 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 22:21:33,158 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2021-05-02 22:21:33,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-02 22:21:33,159 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:21:33,159 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:21:33,378 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-02 22:21:33,378 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:21:33,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:21:33,379 INFO L82 PathProgramCache]: Analyzing trace with hash -1805593115, now seen corresponding path program 4 times [2021-05-02 22:21:33,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:21:33,379 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463511057] [2021-05-02 22:21:33,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:21:33,401 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:21:33,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1477814829] [2021-05-02 22:21:33,402 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:21:33,489 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 22:21:33,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:21:33,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-02 22:21:33,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:21:33,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:33,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:33,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:33,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:33,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:33,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:33,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:33,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:33,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:33,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:33,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:33,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:33,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:33,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:33,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:33,738 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 9 proven. 53 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-02 22:21:33,739 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:21:33,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463511057] [2021-05-02 22:21:33,739 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:21:33,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477814829] [2021-05-02 22:21:33,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477814829] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:21:33,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:21:33,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 22:21:33,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193994957] [2021-05-02 22:21:33,740 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 22:21:33,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:21:33,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 22:21:33,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-05-02 22:21:33,740 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 7 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 22:21:33,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:21:33,879 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2021-05-02 22:21:33,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 22:21:33,879 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 7 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 50 [2021-05-02 22:21:33,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:21:33,880 INFO L225 Difference]: With dead ends: 58 [2021-05-02 22:21:33,880 INFO L226 Difference]: Without dead ends: 55 [2021-05-02 22:21:33,880 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 129.0ms TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-05-02 22:21:33,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-02 22:21:33,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-05-02 22:21:33,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 39 states have internal predecessors, (41), 9 states have call successors, (9), 8 states have call predecessors, (9), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 22:21:33,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2021-05-02 22:21:33,883 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 50 [2021-05-02 22:21:33,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:21:33,883 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2021-05-02 22:21:33,884 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 7 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 22:21:33,884 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2021-05-02 22:21:33,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-02 22:21:33,884 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:21:33,884 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:21:34,092 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-02 22:21:34,093 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:21:34,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:21:34,093 INFO L82 PathProgramCache]: Analyzing trace with hash 847694216, now seen corresponding path program 5 times [2021-05-02 22:21:34,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:21:34,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622310580] [2021-05-02 22:21:34,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:21:34,099 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:21:34,099 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [676715500] [2021-05-02 22:21:34,099 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:21:34,153 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-02 22:21:34,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:21:34,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 22:21:34,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:21:34,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:34,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:34,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:34,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:34,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:34,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:34,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:34,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:34,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:34,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:34,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:34,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:34,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:34,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:34,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:34,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:34,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:34,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:34,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:34,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:34,307 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 22:21:34,307 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:21:34,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622310580] [2021-05-02 22:21:34,308 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:21:34,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676715500] [2021-05-02 22:21:34,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676715500] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:21:34,308 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:21:34,308 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 22:21:34,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480434416] [2021-05-02 22:21:34,308 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 22:21:34,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:21:34,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 22:21:34,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-02 22:21:34,309 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 8 states have call successors, (8), 8 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 22:21:34,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:21:34,407 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2021-05-02 22:21:34,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 22:21:34,407 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 8 states have call successors, (8), 8 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 52 [2021-05-02 22:21:34,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:21:34,407 INFO L225 Difference]: With dead ends: 61 [2021-05-02 22:21:34,407 INFO L226 Difference]: Without dead ends: 61 [2021-05-02 22:21:34,408 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 82.1ms TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-05-02 22:21:34,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-05-02 22:21:34,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2021-05-02 22:21:34,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 44 states have (on average 1.0454545454545454) internal successors, (46), 44 states have internal predecessors, (46), 9 states have call successors, (9), 9 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 22:21:34,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2021-05-02 22:21:34,411 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 52 [2021-05-02 22:21:34,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:21:34,411 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2021-05-02 22:21:34,411 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 8 states have call successors, (8), 8 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 22:21:34,411 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2021-05-02 22:21:34,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-05-02 22:21:34,412 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:21:34,412 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:21:34,620 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:21:34,621 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:21:34,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:21:34,621 INFO L82 PathProgramCache]: Analyzing trace with hash 1447431878, now seen corresponding path program 5 times [2021-05-02 22:21:34,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:21:34,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977438552] [2021-05-02 22:21:34,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:21:34,625 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:21:34,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1469569219] [2021-05-02 22:21:34,625 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:21:34,729 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-02 22:21:34,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:21:34,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-02 22:21:34,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:21:34,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:34,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:34,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:34,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:34,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:34,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:34,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:34,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:34,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:34,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:34,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:34,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:34,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:34,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:34,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:34,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:34,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:34,965 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 14 proven. 73 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-05-02 22:21:34,965 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:21:34,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977438552] [2021-05-02 22:21:34,965 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:21:34,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469569219] [2021-05-02 22:21:34,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469569219] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:21:34,966 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:21:34,966 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 22:21:34,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181870793] [2021-05-02 22:21:34,966 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 22:21:34,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:21:34,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 22:21:34,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2021-05-02 22:21:34,967 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand has 13 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 8 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 22:21:35,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:21:35,144 INFO L93 Difference]: Finished difference Result 66 states and 68 transitions. [2021-05-02 22:21:35,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 22:21:35,145 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 8 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 58 [2021-05-02 22:21:35,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:21:35,146 INFO L225 Difference]: With dead ends: 66 [2021-05-02 22:21:35,146 INFO L226 Difference]: Without dead ends: 63 [2021-05-02 22:21:35,146 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 145.2ms TimeCoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-05-02 22:21:35,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-05-02 22:21:35,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-05-02 22:21:35,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 45 states have (on average 1.0444444444444445) internal successors, (47), 45 states have internal predecessors, (47), 10 states have call successors, (10), 9 states have call predecessors, (10), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 22:21:35,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2021-05-02 22:21:35,149 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 58 [2021-05-02 22:21:35,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:21:35,149 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2021-05-02 22:21:35,149 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 8 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 22:21:35,149 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2021-05-02 22:21:35,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-05-02 22:21:35,150 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:21:35,150 INFO L523 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:21:35,373 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:21:35,373 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:21:35,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:21:35,373 INFO L82 PathProgramCache]: Analyzing trace with hash 268521001, now seen corresponding path program 6 times [2021-05-02 22:21:35,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:21:35,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585766787] [2021-05-02 22:21:35,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:21:35,379 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:21:35,379 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [761901428] [2021-05-02 22:21:35,379 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:21:35,621 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-02 22:21:35,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:21:35,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 22:21:35,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:21:35,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:35,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:35,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:35,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:35,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:35,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:35,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:35,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:35,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:35,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:35,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:35,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:35,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:35,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:35,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:35,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:35,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:35,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:35,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:35,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:35,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:35,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:35,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:35,782 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 22:21:35,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:21:35,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585766787] [2021-05-02 22:21:35,782 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:21:35,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761901428] [2021-05-02 22:21:35,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761901428] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:21:35,782 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:21:35,782 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 22:21:35,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262096273] [2021-05-02 22:21:35,783 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 22:21:35,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:21:35,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 22:21:35,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-02 22:21:35,783 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 9 states have call successors, (9), 9 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 22:21:35,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:21:35,869 INFO L93 Difference]: Finished difference Result 69 states and 70 transitions. [2021-05-02 22:21:35,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 22:21:35,870 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 9 states have call successors, (9), 9 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 60 [2021-05-02 22:21:35,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:21:35,870 INFO L225 Difference]: With dead ends: 69 [2021-05-02 22:21:35,870 INFO L226 Difference]: Without dead ends: 69 [2021-05-02 22:21:35,871 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 78.7ms TimeCoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2021-05-02 22:21:35,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-05-02 22:21:35,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-05-02 22:21:35,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 50 states have (on average 1.04) internal successors, (52), 50 states have internal predecessors, (52), 10 states have call successors, (10), 10 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 22:21:35,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2021-05-02 22:21:35,873 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 60 [2021-05-02 22:21:35,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:21:35,873 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2021-05-02 22:21:35,874 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 9 states have call successors, (9), 9 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 22:21:35,874 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2021-05-02 22:21:35,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-05-02 22:21:35,874 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:21:35,874 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:21:36,075 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:21:36,075 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:21:36,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:21:36,075 INFO L82 PathProgramCache]: Analyzing trace with hash -1416046937, now seen corresponding path program 6 times [2021-05-02 22:21:36,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:21:36,075 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662365652] [2021-05-02 22:21:36,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:21:36,080 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:21:36,080 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1561359934] [2021-05-02 22:21:36,080 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:21:36,343 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-02 22:21:36,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:21:36,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-02 22:21:36,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:21:36,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:36,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:36,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:36,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:36,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:36,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:36,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:36,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:36,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:36,595 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 22 proven. 94 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-05-02 22:21:36,596 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:21:36,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662365652] [2021-05-02 22:21:36,596 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:21:36,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561359934] [2021-05-02 22:21:36,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561359934] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:21:36,596 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:21:36,596 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 22:21:36,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992014970] [2021-05-02 22:21:36,598 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 22:21:36,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:21:36,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 22:21:36,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2021-05-02 22:21:36,599 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 9 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 22:21:36,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:21:36,754 INFO L93 Difference]: Finished difference Result 74 states and 76 transitions. [2021-05-02 22:21:36,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 22:21:36,755 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 9 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 66 [2021-05-02 22:21:36,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:21:36,756 INFO L225 Difference]: With dead ends: 74 [2021-05-02 22:21:36,756 INFO L226 Difference]: Without dead ends: 71 [2021-05-02 22:21:36,756 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 144.2ms TimeCoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-05-02 22:21:36,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-05-02 22:21:36,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2021-05-02 22:21:36,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 51 states have (on average 1.0392156862745099) internal successors, (53), 51 states have internal predecessors, (53), 11 states have call successors, (11), 10 states have call predecessors, (11), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 22:21:36,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2021-05-02 22:21:36,759 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 66 [2021-05-02 22:21:36,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:21:36,759 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2021-05-02 22:21:36,760 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 9 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 22:21:36,760 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2021-05-02 22:21:36,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-02 22:21:36,760 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:21:36,760 INFO L523 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:21:36,965 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-05-02 22:21:36,965 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:21:36,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:21:36,965 INFO L82 PathProgramCache]: Analyzing trace with hash 1539416522, now seen corresponding path program 7 times [2021-05-02 22:21:36,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:21:36,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453957658] [2021-05-02 22:21:36,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:21:36,978 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:21:36,978 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [954862104] [2021-05-02 22:21:36,978 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:21:37,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:21:37,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 22:21:37,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:21:37,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:37,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:37,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:37,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:37,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:37,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:37,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:37,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:37,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:37,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:37,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:37,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:37,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:37,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:37,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:37,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:37,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:37,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:37,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:37,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:37,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:37,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:37,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:37,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:37,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:37,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:37,215 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 14 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 22:21:37,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:21:37,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453957658] [2021-05-02 22:21:37,216 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:21:37,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954862104] [2021-05-02 22:21:37,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954862104] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:21:37,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:21:37,216 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 22:21:37,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714097314] [2021-05-02 22:21:37,216 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 22:21:37,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:21:37,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 22:21:37,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-05-02 22:21:37,217 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 10 states have call successors, (10), 10 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 22:21:37,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:21:37,356 INFO L93 Difference]: Finished difference Result 77 states and 78 transitions. [2021-05-02 22:21:37,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 22:21:37,357 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 10 states have call successors, (10), 10 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 68 [2021-05-02 22:21:37,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:21:37,357 INFO L225 Difference]: With dead ends: 77 [2021-05-02 22:21:37,357 INFO L226 Difference]: Without dead ends: 77 [2021-05-02 22:21:37,358 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 108.5ms TimeCoverageRelationStatistics Valid=117, Invalid=189, Unknown=0, NotChecked=0, Total=306 [2021-05-02 22:21:37,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-05-02 22:21:37,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2021-05-02 22:21:37,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 56 states have (on average 1.0357142857142858) internal successors, (58), 56 states have internal predecessors, (58), 11 states have call successors, (11), 11 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 22:21:37,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2021-05-02 22:21:37,360 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 68 [2021-05-02 22:21:37,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:21:37,361 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2021-05-02 22:21:37,361 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 10 states have call successors, (10), 10 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 22:21:37,361 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2021-05-02 22:21:37,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-05-02 22:21:37,361 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:21:37,362 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:21:37,569 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-05-02 22:21:37,569 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:21:37,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:21:37,569 INFO L82 PathProgramCache]: Analyzing trace with hash 291122568, now seen corresponding path program 7 times [2021-05-02 22:21:37,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:21:37,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102736460] [2021-05-02 22:21:37,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:21:37,574 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:21:37,574 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1064270321] [2021-05-02 22:21:37,574 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:21:38,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:21:38,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-02 22:21:38,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:21:38,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:38,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:38,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:38,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:38,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:38,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:38,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:38,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:38,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:38,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:38,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:38,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:38,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:38,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:38,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:38,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:38,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:38,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:38,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:38,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:38,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:38,379 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 15 proven. 134 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-05-02 22:21:38,379 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:21:38,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102736460] [2021-05-02 22:21:38,380 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:21:38,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064270321] [2021-05-02 22:21:38,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064270321] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:21:38,380 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:21:38,380 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-02 22:21:38,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058908547] [2021-05-02 22:21:38,380 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 22:21:38,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:21:38,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 22:21:38,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2021-05-02 22:21:38,381 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand has 15 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 10 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 22:21:38,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:21:38,613 INFO L93 Difference]: Finished difference Result 82 states and 84 transitions. [2021-05-02 22:21:38,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 22:21:38,614 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 10 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 74 [2021-05-02 22:21:38,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:21:38,614 INFO L225 Difference]: With dead ends: 82 [2021-05-02 22:21:38,614 INFO L226 Difference]: Without dead ends: 79 [2021-05-02 22:21:38,614 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 183.4ms TimeCoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-05-02 22:21:38,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-05-02 22:21:38,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2021-05-02 22:21:38,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 57 states have (on average 1.0350877192982457) internal successors, (59), 57 states have internal predecessors, (59), 12 states have call successors, (12), 11 states have call predecessors, (12), 9 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 22:21:38,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 81 transitions. [2021-05-02 22:21:38,616 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 81 transitions. Word has length 74 [2021-05-02 22:21:38,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:21:38,617 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 81 transitions. [2021-05-02 22:21:38,617 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 10 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 22:21:38,617 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 81 transitions. [2021-05-02 22:21:38,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-05-02 22:21:38,617 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:21:38,618 INFO L523 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:21:38,822 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-05-02 22:21:38,822 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:21:38,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:21:38,822 INFO L82 PathProgramCache]: Analyzing trace with hash 1451803755, now seen corresponding path program 8 times [2021-05-02 22:21:38,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:21:38,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716104670] [2021-05-02 22:21:38,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:21:38,827 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:21:38,827 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1762527179] [2021-05-02 22:21:38,827 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:21:38,878 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 22:21:38,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:21:38,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 22:21:38,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:21:38,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:38,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:38,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:38,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:38,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:38,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:38,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:38,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:38,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:38,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:38,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:38,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:38,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:38,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:38,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:38,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:38,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:38,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:38,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:38,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:38,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:39,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:39,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:39,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:39,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:39,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:39,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:39,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:39,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:39,070 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 16 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 22:21:39,070 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:21:39,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716104670] [2021-05-02 22:21:39,070 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:21:39,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762527179] [2021-05-02 22:21:39,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762527179] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:21:39,071 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:21:39,071 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 22:21:39,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095996333] [2021-05-02 22:21:39,071 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 22:21:39,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:21:39,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 22:21:39,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-05-02 22:21:39,072 INFO L87 Difference]: Start difference. First operand 79 states and 81 transitions. Second operand has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 11 states have call successors, (11), 11 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 22:21:39,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:21:39,221 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2021-05-02 22:21:39,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-02 22:21:39,222 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 11 states have call successors, (11), 11 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 76 [2021-05-02 22:21:39,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:21:39,223 INFO L225 Difference]: With dead ends: 85 [2021-05-02 22:21:39,223 INFO L226 Difference]: Without dead ends: 85 [2021-05-02 22:21:39,223 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 130.9ms TimeCoverageRelationStatistics Valid=145, Invalid=235, Unknown=0, NotChecked=0, Total=380 [2021-05-02 22:21:39,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-05-02 22:21:39,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2021-05-02 22:21:39,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 62 states have (on average 1.032258064516129) internal successors, (64), 62 states have internal predecessors, (64), 12 states have call successors, (12), 12 states have call predecessors, (12), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 22:21:39,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2021-05-02 22:21:39,226 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 76 [2021-05-02 22:21:39,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:21:39,226 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2021-05-02 22:21:39,226 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 11 states have call successors, (11), 11 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 22:21:39,226 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2021-05-02 22:21:39,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-05-02 22:21:39,228 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:21:39,228 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:21:39,440 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-02 22:21:39,441 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:21:39,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:21:39,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1938494313, now seen corresponding path program 8 times [2021-05-02 22:21:39,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:21:39,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63695767] [2021-05-02 22:21:39,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:21:39,448 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:21:39,448 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [369710477] [2021-05-02 22:21:39,448 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:21:39,849 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 22:21:39,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:21:39,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 48 conjunts are in the unsatisfiable core [2021-05-02 22:21:39,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:21:39,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:40,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:40,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:40,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:40,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:40,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:40,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:40,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:40,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:40,194 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 17 proven. 169 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-05-02 22:21:40,194 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:21:40,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63695767] [2021-05-02 22:21:40,194 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:21:40,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369710477] [2021-05-02 22:21:40,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369710477] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:21:40,194 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:21:40,194 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-02 22:21:40,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979461284] [2021-05-02 22:21:40,194 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 22:21:40,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:21:40,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 22:21:40,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2021-05-02 22:21:40,195 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand has 16 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 11 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 22:21:40,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:21:40,434 INFO L93 Difference]: Finished difference Result 90 states and 92 transitions. [2021-05-02 22:21:40,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 22:21:40,434 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 11 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 82 [2021-05-02 22:21:40,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:21:40,435 INFO L225 Difference]: With dead ends: 90 [2021-05-02 22:21:40,435 INFO L226 Difference]: Without dead ends: 87 [2021-05-02 22:21:40,435 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 213.1ms TimeCoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-05-02 22:21:40,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-05-02 22:21:40,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2021-05-02 22:21:40,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 63 states have (on average 1.0317460317460319) internal successors, (65), 63 states have internal predecessors, (65), 13 states have call successors, (13), 12 states have call predecessors, (13), 10 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 22:21:40,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 89 transitions. [2021-05-02 22:21:40,438 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 89 transitions. Word has length 82 [2021-05-02 22:21:40,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:21:40,438 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 89 transitions. [2021-05-02 22:21:40,439 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 11 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 22:21:40,439 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 89 transitions. [2021-05-02 22:21:40,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-05-02 22:21:40,439 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:21:40,439 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:21:40,643 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-02 22:21:40,644 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:21:40,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:21:40,644 INFO L82 PathProgramCache]: Analyzing trace with hash -266881524, now seen corresponding path program 9 times [2021-05-02 22:21:40,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:21:40,644 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181080343] [2021-05-02 22:21:40,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:21:40,650 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:21:40,650 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [799978982] [2021-05-02 22:21:40,651 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:21:41,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-05-02 22:21:41,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:21:41,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 22:21:41,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:21:41,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:41,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:41,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:41,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:41,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:41,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:41,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:41,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:41,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:41,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:41,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:41,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:41,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:41,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:41,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:41,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:41,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:41,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:41,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:41,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:41,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:41,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:41,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:41,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:41,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:41,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:41,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:41,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:41,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:41,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:41,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:41,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:41,349 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 18 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 22:21:41,349 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:21:41,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181080343] [2021-05-02 22:21:41,349 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:21:41,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799978982] [2021-05-02 22:21:41,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799978982] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:21:41,350 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:21:41,350 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 22:21:41,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3892380] [2021-05-02 22:21:41,350 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 22:21:41,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:21:41,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 22:21:41,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-05-02 22:21:41,351 INFO L87 Difference]: Start difference. First operand 87 states and 89 transitions. Second operand has 13 states, 13 states have (on average 4.769230769230769) internal successors, (62), 12 states have internal predecessors, (62), 12 states have call successors, (12), 12 states have call predecessors, (12), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 22:21:41,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:21:41,500 INFO L93 Difference]: Finished difference Result 93 states and 94 transitions. [2021-05-02 22:21:41,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-02 22:21:41,500 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.769230769230769) internal successors, (62), 12 states have internal predecessors, (62), 12 states have call successors, (12), 12 states have call predecessors, (12), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 84 [2021-05-02 22:21:41,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:21:41,501 INFO L225 Difference]: With dead ends: 93 [2021-05-02 22:21:41,501 INFO L226 Difference]: Without dead ends: 93 [2021-05-02 22:21:41,501 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 145.3ms TimeCoverageRelationStatistics Valid=176, Invalid=286, Unknown=0, NotChecked=0, Total=462 [2021-05-02 22:21:41,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-05-02 22:21:41,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2021-05-02 22:21:41,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 68 states have (on average 1.0294117647058822) internal successors, (70), 68 states have internal predecessors, (70), 13 states have call successors, (13), 13 states have call predecessors, (13), 11 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 22:21:41,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2021-05-02 22:21:41,504 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 84 [2021-05-02 22:21:41,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:21:41,504 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2021-05-02 22:21:41,505 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.769230769230769) internal successors, (62), 12 states have internal predecessors, (62), 12 states have call successors, (12), 12 states have call predecessors, (12), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 22:21:41,505 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2021-05-02 22:21:41,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-05-02 22:21:41,505 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:21:41,505 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:21:41,709 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:21:41,709 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:21:41,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:21:41,709 INFO L82 PathProgramCache]: Analyzing trace with hash 757893194, now seen corresponding path program 9 times [2021-05-02 22:21:41,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:21:41,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450518962] [2021-05-02 22:21:41,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:21:41,715 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:21:41,715 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1505704218] [2021-05-02 22:21:41,715 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:21:42,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-05-02 22:21:42,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:21:42,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 66 conjunts are in the unsatisfiable core [2021-05-02 22:21:42,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:21:42,302 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 6 [2021-05-02 22:21:42,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:42,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:42,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:42,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:42,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:42,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:42,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:42,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:42,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:42,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:42,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:42,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:42,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:42,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:42,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:42,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:42,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:42,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:42,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:42,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:42,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:42,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:42,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:42,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:42,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:42,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:42,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:42,751 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 59 proven. 204 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-05-02 22:21:42,751 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:21:42,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450518962] [2021-05-02 22:21:42,751 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:21:42,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505704218] [2021-05-02 22:21:42,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505704218] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:21:42,751 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:21:42,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-05-02 22:21:42,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019298062] [2021-05-02 22:21:42,752 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-02 22:21:42,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:21:42,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-02 22:21:42,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-05-02 22:21:42,753 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand has 20 states, 19 states have (on average 2.210526315789474) internal successors, (42), 16 states have internal predecessors, (42), 12 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 22:21:43,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:21:43,043 INFO L93 Difference]: Finished difference Result 98 states and 100 transitions. [2021-05-02 22:21:43,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 22:21:43,044 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.210526315789474) internal successors, (42), 16 states have internal predecessors, (42), 12 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Word has length 90 [2021-05-02 22:21:43,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:21:43,044 INFO L225 Difference]: With dead ends: 98 [2021-05-02 22:21:43,044 INFO L226 Difference]: Without dead ends: 95 [2021-05-02 22:21:43,045 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 462.2ms TimeCoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-05-02 22:21:43,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-05-02 22:21:43,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2021-05-02 22:21:43,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 69 states have (on average 1.0289855072463767) internal successors, (71), 69 states have internal predecessors, (71), 14 states have call successors, (14), 13 states have call predecessors, (14), 11 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 22:21:43,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 97 transitions. [2021-05-02 22:21:43,048 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 97 transitions. Word has length 90 [2021-05-02 22:21:43,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:21:43,048 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 97 transitions. [2021-05-02 22:21:43,048 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 19 states have (on average 2.210526315789474) internal successors, (42), 16 states have internal predecessors, (42), 12 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 22:21:43,048 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 97 transitions. [2021-05-02 22:21:43,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-05-02 22:21:43,049 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:21:43,049 INFO L523 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:21:43,253 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-05-02 22:21:43,253 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:21:43,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:21:43,254 INFO L82 PathProgramCache]: Analyzing trace with hash -953190739, now seen corresponding path program 10 times [2021-05-02 22:21:43,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:21:43,254 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258897588] [2021-05-02 22:21:43,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:21:43,263 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:21:43,263 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1559505898] [2021-05-02 22:21:43,264 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:21:43,988 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 22:21:43,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:21:43,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-02 22:21:43,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:21:43,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:44,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:44,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:44,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:44,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:44,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:44,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:44,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:44,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:44,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:44,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:44,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:44,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:44,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:44,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:44,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:44,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:44,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:44,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:44,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:44,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:44,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:44,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:44,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:44,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:44,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:44,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:44,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:44,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:44,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:44,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:44,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:44,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:44,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:44,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:44,258 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 20 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 22:21:44,258 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:21:44,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258897588] [2021-05-02 22:21:44,259 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:21:44,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559505898] [2021-05-02 22:21:44,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559505898] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:21:44,259 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:21:44,259 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 22:21:44,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774726533] [2021-05-02 22:21:44,259 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 22:21:44,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:21:44,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 22:21:44,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-05-02 22:21:44,260 INFO L87 Difference]: Start difference. First operand 95 states and 97 transitions. Second operand has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 13 states have internal predecessors, (68), 13 states have call successors, (13), 13 states have call predecessors, (13), 11 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 22:21:46,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:21:46,457 INFO L93 Difference]: Finished difference Result 101 states and 102 transitions. [2021-05-02 22:21:46,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-02 22:21:46,458 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 13 states have internal predecessors, (68), 13 states have call successors, (13), 13 states have call predecessors, (13), 11 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Word has length 92 [2021-05-02 22:21:46,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:21:46,458 INFO L225 Difference]: With dead ends: 101 [2021-05-02 22:21:46,458 INFO L226 Difference]: Without dead ends: 101 [2021-05-02 22:21:46,459 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 176.0ms TimeCoverageRelationStatistics Valid=210, Invalid=342, Unknown=0, NotChecked=0, Total=552 [2021-05-02 22:21:46,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-05-02 22:21:46,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2021-05-02 22:21:46,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 74 states have (on average 1.027027027027027) internal successors, (76), 74 states have internal predecessors, (76), 14 states have call successors, (14), 14 states have call predecessors, (14), 12 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 22:21:46,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2021-05-02 22:21:46,462 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 92 [2021-05-02 22:21:46,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:21:46,462 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2021-05-02 22:21:46,462 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 13 states have internal predecessors, (68), 13 states have call successors, (13), 13 states have call predecessors, (13), 11 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 22:21:46,462 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2021-05-02 22:21:46,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-05-02 22:21:46,463 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:21:46,463 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:21:46,667 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:21:46,667 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:21:46,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:21:46,668 INFO L82 PathProgramCache]: Analyzing trace with hash 138382379, now seen corresponding path program 10 times [2021-05-02 22:21:46,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:21:46,668 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444395325] [2021-05-02 22:21:46,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:21:46,675 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:21:46,675 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1464164866] [2021-05-02 22:21:46,675 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:21:47,167 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 22:21:47,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:21:47,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 56 conjunts are in the unsatisfiable core [2021-05-02 22:21:47,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:21:47,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:21:59,793 WARN L860 $PredicateComparison]: unable to prove that (and (= c_main_~c~0 0) (= c_main_~y~0 0) (= (mod (+ (* c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0) (* 2 c_main_~y~0 c_main_~y~0 c_main_~y~0) (* c_main_~y~0 c_main_~y~0)) 4) 0)) is different from true [2021-05-02 22:22:00,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:00,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:00,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:00,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:00,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:00,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:00,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:00,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:00,093 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 21 proven. 241 refuted. 0 times theorem prover too weak. 190 trivial. 10 not checked. [2021-05-02 22:22:00,094 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:22:00,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444395325] [2021-05-02 22:22:00,094 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:22:00,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464164866] [2021-05-02 22:22:00,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464164866] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:22:00,094 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:22:00,094 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-05-02 22:22:00,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494386812] [2021-05-02 22:22:00,094 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-02 22:22:00,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:22:00,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-02 22:22:00,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=273, Unknown=1, NotChecked=32, Total=342 [2021-05-02 22:22:00,095 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand has 19 states, 18 states have (on average 2.5) internal successors, (45), 17 states have internal predecessors, (45), 13 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 22:22:00,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:22:00,379 INFO L93 Difference]: Finished difference Result 106 states and 108 transitions. [2021-05-02 22:22:00,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-02 22:22:00,379 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.5) internal successors, (45), 17 states have internal predecessors, (45), 13 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Word has length 98 [2021-05-02 22:22:00,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:22:00,380 INFO L225 Difference]: With dead ends: 106 [2021-05-02 22:22:00,380 INFO L226 Difference]: Without dead ends: 103 [2021-05-02 22:22:00,380 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 12802.1ms TimeCoverageRelationStatistics Valid=51, Invalid=372, Unknown=1, NotChecked=38, Total=462 [2021-05-02 22:22:00,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-05-02 22:22:00,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2021-05-02 22:22:00,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 75 states have (on average 1.0266666666666666) internal successors, (77), 75 states have internal predecessors, (77), 15 states have call successors, (15), 14 states have call predecessors, (15), 12 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 22:22:00,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 105 transitions. [2021-05-02 22:22:00,383 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 105 transitions. Word has length 98 [2021-05-02 22:22:00,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:22:00,384 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 105 transitions. [2021-05-02 22:22:00,384 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 18 states have (on average 2.5) internal successors, (45), 17 states have internal predecessors, (45), 13 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 22:22:00,384 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 105 transitions. [2021-05-02 22:22:00,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-05-02 22:22:00,385 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:22:00,385 INFO L523 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:22:00,585 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-05-02 22:22:00,585 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:22:00,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:22:00,586 INFO L82 PathProgramCache]: Analyzing trace with hash 697370190, now seen corresponding path program 11 times [2021-05-02 22:22:00,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:22:00,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996812250] [2021-05-02 22:22:00,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:22:00,593 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:22:00,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1970633186] [2021-05-02 22:22:00,593 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:22:01,748 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-05-02 22:22:01,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:22:01,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-02 22:22:01,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:22:01,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:01,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:01,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:01,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:01,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:01,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:01,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:01,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:01,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:01,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:01,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:01,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:01,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:01,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:01,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:01,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:01,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:01,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:01,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:01,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:01,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:01,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:01,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:01,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:01,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:01,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:01,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:01,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:01,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:01,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:01,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:01,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:01,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:01,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:01,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:01,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:01,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:01,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:02,010 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 22 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 22:22:02,010 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:22:02,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996812250] [2021-05-02 22:22:02,010 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:22:02,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970633186] [2021-05-02 22:22:02,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970633186] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:22:02,010 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:22:02,011 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-02 22:22:02,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736544646] [2021-05-02 22:22:02,011 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 22:22:02,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:22:02,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 22:22:02,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2021-05-02 22:22:02,012 INFO L87 Difference]: Start difference. First operand 103 states and 105 transitions. Second operand has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 14 states have internal predecessors, (74), 14 states have call successors, (14), 14 states have call predecessors, (14), 12 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 22:22:02,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:22:02,214 INFO L93 Difference]: Finished difference Result 109 states and 110 transitions. [2021-05-02 22:22:02,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-02 22:22:02,215 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 14 states have internal predecessors, (74), 14 states have call successors, (14), 14 states have call predecessors, (14), 12 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Word has length 100 [2021-05-02 22:22:02,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:22:02,216 INFO L225 Difference]: With dead ends: 109 [2021-05-02 22:22:02,216 INFO L226 Difference]: Without dead ends: 109 [2021-05-02 22:22:02,216 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 195.4ms TimeCoverageRelationStatistics Valid=247, Invalid=403, Unknown=0, NotChecked=0, Total=650 [2021-05-02 22:22:02,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-05-02 22:22:02,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2021-05-02 22:22:02,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 80 states have (on average 1.025) internal successors, (82), 80 states have internal predecessors, (82), 15 states have call successors, (15), 15 states have call predecessors, (15), 13 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 22:22:02,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2021-05-02 22:22:02,219 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 100 [2021-05-02 22:22:02,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:22:02,219 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2021-05-02 22:22:02,219 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 14 states have internal predecessors, (74), 14 states have call successors, (14), 14 states have call predecessors, (14), 12 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 22:22:02,219 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2021-05-02 22:22:02,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-05-02 22:22:02,220 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:22:02,220 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:22:02,420 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-05-02 22:22:02,421 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:22:02,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:22:02,421 INFO L82 PathProgramCache]: Analyzing trace with hash 1036328716, now seen corresponding path program 11 times [2021-05-02 22:22:02,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:22:02,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255251814] [2021-05-02 22:22:02,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:22:02,426 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:22:02,426 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1380099500] [2021-05-02 22:22:02,427 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:22:03,245 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-05-02 22:22:03,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:22:03,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 60 conjunts are in the unsatisfiable core [2021-05-02 22:22:03,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:22:03,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:03,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:03,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:03,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:03,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:03,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:03,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:03,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:03,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:03,611 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 26 proven. 295 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-05-02 22:22:03,611 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:22:03,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255251814] [2021-05-02 22:22:03,611 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:22:03,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380099500] [2021-05-02 22:22:03,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380099500] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:22:03,611 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:22:03,611 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-05-02 22:22:03,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813135509] [2021-05-02 22:22:03,612 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-02 22:22:03,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:22:03,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-02 22:22:03,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-02 22:22:03,612 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand has 19 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 14 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 22:22:03,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:22:03,891 INFO L93 Difference]: Finished difference Result 114 states and 116 transitions. [2021-05-02 22:22:03,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-02 22:22:03,891 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 14 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Word has length 106 [2021-05-02 22:22:03,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:22:03,892 INFO L225 Difference]: With dead ends: 114 [2021-05-02 22:22:03,892 INFO L226 Difference]: Without dead ends: 111 [2021-05-02 22:22:03,892 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 87 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 221.8ms TimeCoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2021-05-02 22:22:03,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-05-02 22:22:03,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2021-05-02 22:22:03,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 81 states have (on average 1.0246913580246915) internal successors, (83), 81 states have internal predecessors, (83), 16 states have call successors, (16), 15 states have call predecessors, (16), 13 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-02 22:22:03,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 113 transitions. [2021-05-02 22:22:03,895 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 113 transitions. Word has length 106 [2021-05-02 22:22:03,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:22:03,895 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 113 transitions. [2021-05-02 22:22:03,896 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 14 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 22:22:03,896 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 113 transitions. [2021-05-02 22:22:03,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-05-02 22:22:03,896 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:22:03,896 INFO L523 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:22:04,101 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-05-02 22:22:04,101 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:22:04,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:22:04,101 INFO L82 PathProgramCache]: Analyzing trace with hash 335373551, now seen corresponding path program 12 times [2021-05-02 22:22:04,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:22:04,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051742241] [2021-05-02 22:22:04,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:22:04,106 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:22:04,106 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [637481774] [2021-05-02 22:22:04,106 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:22:04,306 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-05-02 22:22:04,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:22:04,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-02 22:22:04,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:22:04,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:04,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:04,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:04,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:04,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:04,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:04,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:04,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:04,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:04,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:04,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:04,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:04,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:04,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:04,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:04,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:04,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:04,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:04,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:04,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:04,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:04,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:04,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:04,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:04,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:04,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:04,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:04,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:04,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:04,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:04,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:04,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:04,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:04,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:04,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:04,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:04,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:04,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:04,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:04,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:04,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:04,629 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 24 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 22:22:04,629 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:22:04,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051742241] [2021-05-02 22:22:04,631 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:22:04,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637481774] [2021-05-02 22:22:04,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637481774] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:22:04,631 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:22:04,631 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-02 22:22:04,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594137401] [2021-05-02 22:22:04,632 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 22:22:04,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:22:04,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 22:22:04,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2021-05-02 22:22:04,633 INFO L87 Difference]: Start difference. First operand 111 states and 113 transitions. Second operand has 16 states, 16 states have (on average 5.0) internal successors, (80), 15 states have internal predecessors, (80), 15 states have call successors, (15), 15 states have call predecessors, (15), 13 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 22:22:04,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:22:04,860 INFO L93 Difference]: Finished difference Result 117 states and 118 transitions. [2021-05-02 22:22:04,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-02 22:22:04,860 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.0) internal successors, (80), 15 states have internal predecessors, (80), 15 states have call successors, (15), 15 states have call predecessors, (15), 13 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Word has length 108 [2021-05-02 22:22:04,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:22:04,861 INFO L225 Difference]: With dead ends: 117 [2021-05-02 22:22:04,861 INFO L226 Difference]: Without dead ends: 117 [2021-05-02 22:22:04,861 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 235.5ms TimeCoverageRelationStatistics Valid=287, Invalid=469, Unknown=0, NotChecked=0, Total=756 [2021-05-02 22:22:04,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-05-02 22:22:04,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2021-05-02 22:22:04,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 86 states have (on average 1.0232558139534884) internal successors, (88), 86 states have internal predecessors, (88), 16 states have call successors, (16), 16 states have call predecessors, (16), 14 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-02 22:22:04,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2021-05-02 22:22:04,865 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 108 [2021-05-02 22:22:04,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:22:04,865 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2021-05-02 22:22:04,865 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.0) internal successors, (80), 15 states have internal predecessors, (80), 15 states have call successors, (15), 15 states have call predecessors, (15), 13 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 22:22:04,865 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2021-05-02 22:22:04,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-05-02 22:22:04,866 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:22:04,866 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:22:05,070 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-05-02 22:22:05,070 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:22:05,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:22:05,070 INFO L82 PathProgramCache]: Analyzing trace with hash 1975402733, now seen corresponding path program 12 times [2021-05-02 22:22:05,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:22:05,070 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118454910] [2021-05-02 22:22:05,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:22:05,075 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:22:05,075 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [328898176] [2021-05-02 22:22:05,075 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:22:05,356 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-05-02 22:22:05,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:22:05,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 67 conjunts are in the unsatisfiable core [2021-05-02 22:22:05,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:22:05,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:05,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:05,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:05,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:05,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:05,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:05,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:05,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:05,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:05,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:05,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:05,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:05,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:05,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:05,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:05,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:05,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:05,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:05,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:05,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:05,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:05,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:05,821 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 25 proven. 349 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2021-05-02 22:22:05,821 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:22:05,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118454910] [2021-05-02 22:22:05,822 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:22:05,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328898176] [2021-05-02 22:22:05,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328898176] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:22:05,822 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:22:05,822 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-05-02 22:22:05,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46791651] [2021-05-02 22:22:05,822 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-02 22:22:05,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:22:05,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-02 22:22:05,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=379, Unknown=0, NotChecked=0, Total=420 [2021-05-02 22:22:05,823 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand has 21 states, 20 states have (on average 2.55) internal successors, (51), 19 states have internal predecessors, (51), 15 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-02 22:22:06,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:22:06,146 INFO L93 Difference]: Finished difference Result 122 states and 124 transitions. [2021-05-02 22:22:06,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-02 22:22:06,146 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.55) internal successors, (51), 19 states have internal predecessors, (51), 15 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Word has length 114 [2021-05-02 22:22:06,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:22:06,147 INFO L225 Difference]: With dead ends: 122 [2021-05-02 22:22:06,147 INFO L226 Difference]: Without dead ends: 119 [2021-05-02 22:22:06,147 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 272.8ms TimeCoverageRelationStatistics Valid=56, Invalid=496, Unknown=0, NotChecked=0, Total=552 [2021-05-02 22:22:06,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-05-02 22:22:06,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2021-05-02 22:22:06,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 87 states have (on average 1.0229885057471264) internal successors, (89), 87 states have internal predecessors, (89), 17 states have call successors, (17), 16 states have call predecessors, (17), 14 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 22:22:06,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 121 transitions. [2021-05-02 22:22:06,150 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 121 transitions. Word has length 114 [2021-05-02 22:22:06,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:22:06,151 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 121 transitions. [2021-05-02 22:22:06,151 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 20 states have (on average 2.55) internal successors, (51), 19 states have internal predecessors, (51), 15 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-02 22:22:06,151 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 121 transitions. [2021-05-02 22:22:06,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-05-02 22:22:06,152 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:22:06,152 INFO L523 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:22:06,355 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-05-02 22:22:06,356 INFO L428 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:22:06,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:22:06,356 INFO L82 PathProgramCache]: Analyzing trace with hash 842371728, now seen corresponding path program 13 times [2021-05-02 22:22:06,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:22:06,356 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718253501] [2021-05-02 22:22:06,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:22:06,361 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:22:06,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [150285579] [2021-05-02 22:22:06,361 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:22:06,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:22:06,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-02 22:22:06,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:22:06,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:06,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:06,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:06,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:06,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:06,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:06,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:06,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:06,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:06,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:06,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:06,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:06,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:06,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:06,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:06,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:06,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:06,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:06,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:06,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:06,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:06,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:06,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:06,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:06,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:06,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:06,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:06,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:06,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:06,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:06,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:06,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:06,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:06,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:06,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:06,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:06,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:06,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:06,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:06,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:06,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:06,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:06,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:06,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:06,791 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 26 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 22:22:06,791 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:22:06,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718253501] [2021-05-02 22:22:06,791 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:22:06,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150285579] [2021-05-02 22:22:06,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150285579] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:22:06,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:22:06,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-02 22:22:06,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950446947] [2021-05-02 22:22:06,792 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-02 22:22:06,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:22:06,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-02 22:22:06,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2021-05-02 22:22:06,793 INFO L87 Difference]: Start difference. First operand 119 states and 121 transitions. Second operand has 17 states, 17 states have (on average 5.0588235294117645) internal successors, (86), 16 states have internal predecessors, (86), 16 states have call successors, (16), 16 states have call predecessors, (16), 14 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-02 22:22:07,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:22:07,052 INFO L93 Difference]: Finished difference Result 125 states and 126 transitions. [2021-05-02 22:22:07,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-02 22:22:07,053 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.0588235294117645) internal successors, (86), 16 states have internal predecessors, (86), 16 states have call successors, (16), 16 states have call predecessors, (16), 14 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Word has length 116 [2021-05-02 22:22:07,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:22:07,053 INFO L225 Difference]: With dead ends: 125 [2021-05-02 22:22:07,053 INFO L226 Difference]: Without dead ends: 125 [2021-05-02 22:22:07,054 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 264.8ms TimeCoverageRelationStatistics Valid=330, Invalid=540, Unknown=0, NotChecked=0, Total=870 [2021-05-02 22:22:07,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-05-02 22:22:07,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2021-05-02 22:22:07,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 92 states have (on average 1.0217391304347827) internal successors, (94), 92 states have internal predecessors, (94), 17 states have call successors, (17), 17 states have call predecessors, (17), 15 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 22:22:07,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 126 transitions. [2021-05-02 22:22:07,057 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 126 transitions. Word has length 116 [2021-05-02 22:22:07,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:22:07,057 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 126 transitions. [2021-05-02 22:22:07,057 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.0588235294117645) internal successors, (86), 16 states have internal predecessors, (86), 16 states have call successors, (16), 16 states have call predecessors, (16), 14 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-02 22:22:07,057 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 126 transitions. [2021-05-02 22:22:07,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-05-02 22:22:07,058 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:22:07,058 INFO L523 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:22:07,264 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:22:07,266 INFO L428 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:22:07,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:22:07,266 INFO L82 PathProgramCache]: Analyzing trace with hash -953421362, now seen corresponding path program 13 times [2021-05-02 22:22:07,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:22:07,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908011230] [2021-05-02 22:22:07,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:22:07,272 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:22:07,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1691487941] [2021-05-02 22:22:07,273 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:22:07,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:22:07,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 68 conjunts are in the unsatisfiable core [2021-05-02 22:22:07,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:22:07,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:08,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:08,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:08,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:08,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:08,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:08,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:08,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:08,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:08,416 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 27 proven. 404 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2021-05-02 22:22:08,416 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:22:08,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908011230] [2021-05-02 22:22:08,416 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:22:08,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691487941] [2021-05-02 22:22:08,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691487941] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:22:08,417 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:22:08,417 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-05-02 22:22:08,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348915135] [2021-05-02 22:22:08,417 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-02 22:22:08,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:22:08,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-02 22:22:08,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=380, Unknown=0, NotChecked=0, Total=420 [2021-05-02 22:22:08,418 INFO L87 Difference]: Start difference. First operand 125 states and 126 transitions. Second operand has 21 states, 20 states have (on average 2.7) internal successors, (54), 20 states have internal predecessors, (54), 16 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 22:22:08,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:22:08,822 INFO L93 Difference]: Finished difference Result 130 states and 132 transitions. [2021-05-02 22:22:08,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-02 22:22:08,822 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.7) internal successors, (54), 20 states have internal predecessors, (54), 16 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) Word has length 122 [2021-05-02 22:22:08,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:22:08,823 INFO L225 Difference]: With dead ends: 130 [2021-05-02 22:22:08,823 INFO L226 Difference]: Without dead ends: 127 [2021-05-02 22:22:08,823 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 392.3ms TimeCoverageRelationStatistics Valid=55, Invalid=497, Unknown=0, NotChecked=0, Total=552 [2021-05-02 22:22:08,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-05-02 22:22:08,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2021-05-02 22:22:08,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 93 states have (on average 1.021505376344086) internal successors, (95), 93 states have internal predecessors, (95), 18 states have call successors, (18), 17 states have call predecessors, (18), 15 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-02 22:22:08,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 129 transitions. [2021-05-02 22:22:08,827 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 129 transitions. Word has length 122 [2021-05-02 22:22:08,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:22:08,827 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 129 transitions. [2021-05-02 22:22:08,827 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 20 states have (on average 2.7) internal successors, (54), 20 states have internal predecessors, (54), 16 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 22:22:08,827 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 129 transitions. [2021-05-02 22:22:08,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-05-02 22:22:08,828 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:22:08,828 INFO L523 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:22:09,032 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-05-02 22:22:09,032 INFO L428 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:22:09,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:22:09,033 INFO L82 PathProgramCache]: Analyzing trace with hash -554004687, now seen corresponding path program 14 times [2021-05-02 22:22:09,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:22:09,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120337733] [2021-05-02 22:22:09,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:22:09,041 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:22:09,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1858013819] [2021-05-02 22:22:09,041 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:22:09,110 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 22:22:09,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:22:09,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-02 22:22:09,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:22:09,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:09,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:09,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:09,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:09,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:09,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:09,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:09,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:09,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:09,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:09,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:09,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:09,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:09,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:09,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:09,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:09,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:09,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:09,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:09,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:09,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:09,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:09,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:09,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:09,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:09,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:09,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:09,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:09,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:09,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:09,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:09,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:09,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:09,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:09,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:09,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:09,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:09,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:09,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:09,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:09,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:09,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:09,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:09,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:09,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:09,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:09,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:09,434 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 28 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 22:22:09,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:22:09,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120337733] [2021-05-02 22:22:09,435 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:22:09,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858013819] [2021-05-02 22:22:09,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858013819] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:22:09,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:22:09,435 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-05-02 22:22:09,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207352974] [2021-05-02 22:22:09,435 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 22:22:09,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:22:09,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 22:22:09,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2021-05-02 22:22:09,436 INFO L87 Difference]: Start difference. First operand 127 states and 129 transitions. Second operand has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 17 states have internal predecessors, (92), 17 states have call successors, (17), 17 states have call predecessors, (17), 15 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 22:22:09,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:22:09,659 INFO L93 Difference]: Finished difference Result 133 states and 134 transitions. [2021-05-02 22:22:09,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-02 22:22:09,659 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 17 states have internal predecessors, (92), 17 states have call successors, (17), 17 states have call predecessors, (17), 15 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) Word has length 124 [2021-05-02 22:22:09,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:22:09,660 INFO L225 Difference]: With dead ends: 133 [2021-05-02 22:22:09,660 INFO L226 Difference]: Without dead ends: 133 [2021-05-02 22:22:09,660 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 258.8ms TimeCoverageRelationStatistics Valid=376, Invalid=616, Unknown=0, NotChecked=0, Total=992 [2021-05-02 22:22:09,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-05-02 22:22:09,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2021-05-02 22:22:09,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 98 states have (on average 1.0204081632653061) internal successors, (100), 98 states have internal predecessors, (100), 18 states have call successors, (18), 18 states have call predecessors, (18), 16 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-02 22:22:09,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 134 transitions. [2021-05-02 22:22:09,663 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 134 transitions. Word has length 124 [2021-05-02 22:22:09,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:22:09,664 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 134 transitions. [2021-05-02 22:22:09,664 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 17 states have internal predecessors, (92), 17 states have call successors, (17), 17 states have call predecessors, (17), 15 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 22:22:09,664 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 134 transitions. [2021-05-02 22:22:09,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-05-02 22:22:09,665 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:22:09,665 INFO L523 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:22:09,880 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-05-02 22:22:09,881 INFO L428 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:22:09,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:22:09,881 INFO L82 PathProgramCache]: Analyzing trace with hash -1206963793, now seen corresponding path program 14 times [2021-05-02 22:22:09,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:22:09,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566127492] [2021-05-02 22:22:09,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:22:09,885 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:22:09,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1354047722] [2021-05-02 22:22:09,885 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:22:10,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 22:22:10,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:22:10,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 72 conjunts are in the unsatisfiable core [2021-05-02 22:22:10,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:22:10,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:11,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:11,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:11,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:11,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:11,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:11,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:11,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:11,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:11,152 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 29 proven. 463 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2021-05-02 22:22:11,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:22:11,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566127492] [2021-05-02 22:22:11,153 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:22:11,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354047722] [2021-05-02 22:22:11,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354047722] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:22:11,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:22:11,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2021-05-02 22:22:11,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108920857] [2021-05-02 22:22:11,153 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-02 22:22:11,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:22:11,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-02 22:22:11,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=420, Unknown=0, NotChecked=0, Total=462 [2021-05-02 22:22:11,154 INFO L87 Difference]: Start difference. First operand 133 states and 134 transitions. Second operand has 22 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 17 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-02 22:22:11,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:22:11,528 INFO L93 Difference]: Finished difference Result 138 states and 140 transitions. [2021-05-02 22:22:11,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-02 22:22:11,528 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 17 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Word has length 130 [2021-05-02 22:22:11,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:22:11,529 INFO L225 Difference]: With dead ends: 138 [2021-05-02 22:22:11,529 INFO L226 Difference]: Without dead ends: 135 [2021-05-02 22:22:11,529 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 265.4ms TimeCoverageRelationStatistics Valid=57, Invalid=543, Unknown=0, NotChecked=0, Total=600 [2021-05-02 22:22:11,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-05-02 22:22:11,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2021-05-02 22:22:11,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 99 states have (on average 1.02020202020202) internal successors, (101), 99 states have internal predecessors, (101), 19 states have call successors, (19), 18 states have call predecessors, (19), 16 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-02 22:22:11,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 137 transitions. [2021-05-02 22:22:11,532 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 137 transitions. Word has length 130 [2021-05-02 22:22:11,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:22:11,532 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 137 transitions. [2021-05-02 22:22:11,533 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 17 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-02 22:22:11,533 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 137 transitions. [2021-05-02 22:22:11,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-05-02 22:22:11,533 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:22:11,533 INFO L523 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:22:11,738 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-05-02 22:22:11,738 INFO L428 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:22:11,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:22:11,738 INFO L82 PathProgramCache]: Analyzing trace with hash 604854994, now seen corresponding path program 15 times [2021-05-02 22:22:11,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:22:11,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177225195] [2021-05-02 22:22:11,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:22:11,743 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:22:11,743 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1953902812] [2021-05-02 22:22:11,743 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:22:12,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-05-02 22:22:12,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:22:12,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-02 22:22:12,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:22:12,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:12,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:12,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:12,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:12,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:12,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:12,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:12,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:12,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:12,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:12,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:12,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:12,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:12,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:12,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:12,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:12,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:12,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:12,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:12,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:12,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:12,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:12,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:12,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:12,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:12,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:12,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:12,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:12,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:12,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:12,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:12,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:12,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:12,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:12,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:12,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:12,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:12,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:12,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:12,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:12,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:12,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:12,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:12,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:12,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:12,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:12,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:12,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:12,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:12,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:12,908 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 30 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 22:22:12,909 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:22:12,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177225195] [2021-05-02 22:22:12,909 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:22:12,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953902812] [2021-05-02 22:22:12,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953902812] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:22:12,909 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:22:12,909 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-05-02 22:22:12,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082573685] [2021-05-02 22:22:12,909 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-02 22:22:12,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:22:12,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-02 22:22:12,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2021-05-02 22:22:12,910 INFO L87 Difference]: Start difference. First operand 135 states and 137 transitions. Second operand has 19 states, 19 states have (on average 5.157894736842105) internal successors, (98), 18 states have internal predecessors, (98), 18 states have call successors, (18), 18 states have call predecessors, (18), 16 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-02 22:22:13,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:22:13,189 INFO L93 Difference]: Finished difference Result 141 states and 142 transitions. [2021-05-02 22:22:13,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-02 22:22:13,189 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.157894736842105) internal successors, (98), 18 states have internal predecessors, (98), 18 states have call successors, (18), 18 states have call predecessors, (18), 16 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Word has length 132 [2021-05-02 22:22:13,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:22:13,190 INFO L225 Difference]: With dead ends: 141 [2021-05-02 22:22:13,190 INFO L226 Difference]: Without dead ends: 141 [2021-05-02 22:22:13,190 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 289.6ms TimeCoverageRelationStatistics Valid=425, Invalid=697, Unknown=0, NotChecked=0, Total=1122 [2021-05-02 22:22:13,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-05-02 22:22:13,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2021-05-02 22:22:13,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 104 states have (on average 1.0192307692307692) internal successors, (106), 104 states have internal predecessors, (106), 19 states have call successors, (19), 19 states have call predecessors, (19), 17 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-02 22:22:13,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 142 transitions. [2021-05-02 22:22:13,193 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 142 transitions. Word has length 132 [2021-05-02 22:22:13,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:22:13,194 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 142 transitions. [2021-05-02 22:22:13,194 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.157894736842105) internal successors, (98), 18 states have internal predecessors, (98), 18 states have call successors, (18), 18 states have call predecessors, (18), 16 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-02 22:22:13,194 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 142 transitions. [2021-05-02 22:22:13,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-05-02 22:22:13,195 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:22:13,195 INFO L523 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:22:13,399 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-05-02 22:22:13,400 INFO L428 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:22:13,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:22:13,400 INFO L82 PathProgramCache]: Analyzing trace with hash 1030291600, now seen corresponding path program 15 times [2021-05-02 22:22:13,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:22:13,400 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670712990] [2021-05-02 22:22:13,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:22:13,405 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:22:13,406 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [671804632] [2021-05-02 22:22:13,406 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:22:13,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-05-02 22:22:13,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:22:13,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 94 conjunts are in the unsatisfiable core [2021-05-02 22:22:13,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:22:13,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:13,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:13,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:14,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:16,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:16,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:16,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:16,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:16,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:16,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:16,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:16,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:16,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:16,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:16,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:16,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:16,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:16,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:16,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:16,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:16,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:16,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:16,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:16,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:16,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:16,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:16,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:16,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:16,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:16,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:39,056 WARN L205 SmtUtils]: Spent 22.56 s on a formula simplification. DAG size of input: 24 DAG size of output: 20 [2021-05-02 22:22:39,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:39,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:39,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:39,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:39,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:39,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:22:39,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:02,503 WARN L205 SmtUtils]: Spent 13.62 s on a formula simplification. DAG size of input: 27 DAG size of output: 9 [2021-05-02 22:23:02,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:02,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:02,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:02,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:02,576 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 110 proven. 519 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2021-05-02 22:23:02,576 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:23:02,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670712990] [2021-05-02 22:23:02,577 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:23:02,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671804632] [2021-05-02 22:23:02,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671804632] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:23:02,577 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:23:02,577 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2021-05-02 22:23:02,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770537237] [2021-05-02 22:23:02,577 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-02 22:23:02,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:23:02,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-02 22:23:02,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=595, Unknown=2, NotChecked=0, Total=650 [2021-05-02 22:23:02,578 INFO L87 Difference]: Start difference. First operand 141 states and 142 transitions. Second operand has 26 states, 25 states have (on average 2.4) internal successors, (60), 22 states have internal predecessors, (60), 18 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-02 22:23:05,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:23:05,030 INFO L93 Difference]: Finished difference Result 146 states and 148 transitions. [2021-05-02 22:23:05,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-02 22:23:05,030 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.4) internal successors, (60), 22 states have internal predecessors, (60), 18 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) Word has length 138 [2021-05-02 22:23:05,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:23:05,031 INFO L225 Difference]: With dead ends: 146 [2021-05-02 22:23:05,031 INFO L226 Difference]: Without dead ends: 143 [2021-05-02 22:23:05,031 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 48410.3ms TimeCoverageRelationStatistics Valid=69, Invalid=741, Unknown=2, NotChecked=0, Total=812 [2021-05-02 22:23:05,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-05-02 22:23:05,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2021-05-02 22:23:05,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 105 states have (on average 1.019047619047619) internal successors, (107), 105 states have internal predecessors, (107), 20 states have call successors, (20), 19 states have call predecessors, (20), 17 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-02 22:23:05,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 145 transitions. [2021-05-02 22:23:05,034 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 145 transitions. Word has length 138 [2021-05-02 22:23:05,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:23:05,035 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 145 transitions. [2021-05-02 22:23:05,035 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 25 states have (on average 2.4) internal successors, (60), 22 states have internal predecessors, (60), 18 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-02 22:23:05,035 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 145 transitions. [2021-05-02 22:23:05,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-05-02 22:23:05,035 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:23:05,036 INFO L523 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:23:05,241 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-05-02 22:23:05,241 INFO L428 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:23:05,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:23:05,242 INFO L82 PathProgramCache]: Analyzing trace with hash -1171327629, now seen corresponding path program 16 times [2021-05-02 22:23:05,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:23:05,242 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55143953] [2021-05-02 22:23:05,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:23:05,247 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:23:05,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1021318305] [2021-05-02 22:23:05,247 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:23:06,031 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 22:23:06,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:23:06,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-02 22:23:06,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:23:06,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:06,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:06,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:06,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:06,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:06,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:06,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:06,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:06,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:06,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:06,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:06,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:06,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:06,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:06,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:06,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:06,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:06,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:06,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:06,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:06,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:06,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:06,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:06,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:06,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:06,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:06,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:06,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:06,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:06,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:06,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:06,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:06,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:06,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:06,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:06,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:06,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:06,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:06,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:06,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:06,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:06,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:06,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:06,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:06,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:06,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:06,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:06,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:06,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:06,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:06,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:06,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:06,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:06,415 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 32 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 22:23:06,415 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:23:06,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55143953] [2021-05-02 22:23:06,416 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:23:06,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021318305] [2021-05-02 22:23:06,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021318305] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:23:06,416 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:23:06,416 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-05-02 22:23:06,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315668328] [2021-05-02 22:23:06,416 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-02 22:23:06,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:23:06,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-02 22:23:06,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2021-05-02 22:23:06,417 INFO L87 Difference]: Start difference. First operand 143 states and 145 transitions. Second operand has 20 states, 20 states have (on average 5.2) internal successors, (104), 19 states have internal predecessors, (104), 19 states have call successors, (19), 19 states have call predecessors, (19), 17 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-02 22:23:06,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:23:06,936 INFO L93 Difference]: Finished difference Result 149 states and 150 transitions. [2021-05-02 22:23:06,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-02 22:23:06,936 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 19 states have internal predecessors, (104), 19 states have call successors, (19), 19 states have call predecessors, (19), 17 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) Word has length 140 [2021-05-02 22:23:06,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:23:06,937 INFO L225 Difference]: With dead ends: 149 [2021-05-02 22:23:06,937 INFO L226 Difference]: Without dead ends: 149 [2021-05-02 22:23:06,937 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 341.3ms TimeCoverageRelationStatistics Valid=477, Invalid=783, Unknown=0, NotChecked=0, Total=1260 [2021-05-02 22:23:06,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-05-02 22:23:06,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2021-05-02 22:23:06,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 110 states have (on average 1.018181818181818) internal successors, (112), 110 states have internal predecessors, (112), 20 states have call successors, (20), 20 states have call predecessors, (20), 18 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-02 22:23:06,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 150 transitions. [2021-05-02 22:23:06,940 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 150 transitions. Word has length 140 [2021-05-02 22:23:06,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:23:06,941 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 150 transitions. [2021-05-02 22:23:06,941 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 19 states have internal predecessors, (104), 19 states have call successors, (19), 19 states have call predecessors, (19), 17 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-02 22:23:06,941 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 150 transitions. [2021-05-02 22:23:06,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-05-02 22:23:06,941 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:23:06,942 INFO L523 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 17, 17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:23:07,146 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-05-02 22:23:07,146 INFO L428 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:23:07,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:23:07,147 INFO L82 PathProgramCache]: Analyzing trace with hash -1153802639, now seen corresponding path program 16 times [2021-05-02 22:23:07,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:23:07,147 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969009144] [2021-05-02 22:23:07,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:23:07,151 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:23:07,151 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [984293457] [2021-05-02 22:23:07,151 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:23:08,157 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 22:23:08,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:23:08,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 80 conjunts are in the unsatisfiable core [2021-05-02 22:23:08,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:23:08,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:08,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:08,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:08,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:08,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:08,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:08,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:08,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:08,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:08,692 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 33 proven. 593 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2021-05-02 22:23:08,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:23:08,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969009144] [2021-05-02 22:23:08,692 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:23:08,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984293457] [2021-05-02 22:23:08,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984293457] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:23:08,692 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:23:08,692 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2021-05-02 22:23:08,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998045240] [2021-05-02 22:23:08,693 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-02 22:23:08,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:23:08,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-02 22:23:08,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=506, Unknown=0, NotChecked=0, Total=552 [2021-05-02 22:23:08,694 INFO L87 Difference]: Start difference. First operand 149 states and 150 transitions. Second operand has 24 states, 23 states have (on average 2.739130434782609) internal successors, (63), 23 states have internal predecessors, (63), 19 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-02 22:23:09,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:23:09,256 INFO L93 Difference]: Finished difference Result 154 states and 156 transitions. [2021-05-02 22:23:09,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-02 22:23:09,257 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.739130434782609) internal successors, (63), 23 states have internal predecessors, (63), 19 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Word has length 146 [2021-05-02 22:23:09,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:23:09,257 INFO L225 Difference]: With dead ends: 154 [2021-05-02 22:23:09,258 INFO L226 Difference]: Without dead ends: 151 [2021-05-02 22:23:09,258 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 122 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 383.1ms TimeCoverageRelationStatistics Valid=61, Invalid=641, Unknown=0, NotChecked=0, Total=702 [2021-05-02 22:23:09,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-05-02 22:23:09,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2021-05-02 22:23:09,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 111 states have (on average 1.018018018018018) internal successors, (113), 111 states have internal predecessors, (113), 21 states have call successors, (21), 20 states have call predecessors, (21), 18 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2021-05-02 22:23:09,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 153 transitions. [2021-05-02 22:23:09,261 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 153 transitions. Word has length 146 [2021-05-02 22:23:09,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:23:09,261 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 153 transitions. [2021-05-02 22:23:09,262 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 23 states have (on average 2.739130434782609) internal successors, (63), 23 states have internal predecessors, (63), 19 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-02 22:23:09,262 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 153 transitions. [2021-05-02 22:23:09,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-05-02 22:23:09,262 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:23:09,262 INFO L523 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:23:09,463 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-05-02 22:23:09,463 INFO L428 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:23:09,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:23:09,463 INFO L82 PathProgramCache]: Analyzing trace with hash 153116436, now seen corresponding path program 17 times [2021-05-02 22:23:09,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:23:09,464 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248945833] [2021-05-02 22:23:09,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:23:09,469 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:23:09,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1121403408] [2021-05-02 22:23:09,469 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:23:09,908 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-05-02 22:23:09,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:23:09,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-02 22:23:09,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:23:09,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:09,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:09,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:09,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:09,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:09,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:09,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:09,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:09,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:09,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:09,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:09,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:09,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:09,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:09,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:09,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:09,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:09,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:09,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:09,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:09,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:10,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:10,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:10,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:10,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:10,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:10,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:10,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:10,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:10,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:10,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:10,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:10,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:10,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:10,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:10,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:10,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:10,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:10,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:10,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:10,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:10,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:10,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:10,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:10,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:10,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:10,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:10,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:10,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:10,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:10,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:10,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:10,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:10,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:10,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:10,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:10,298 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 34 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 22:23:10,298 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:23:10,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248945833] [2021-05-02 22:23:10,298 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:23:10,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121403408] [2021-05-02 22:23:10,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121403408] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:23:10,298 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:23:10,298 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-05-02 22:23:10,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944400523] [2021-05-02 22:23:10,298 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-02 22:23:10,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:23:10,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-02 22:23:10,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2021-05-02 22:23:10,299 INFO L87 Difference]: Start difference. First operand 151 states and 153 transitions. Second operand has 21 states, 21 states have (on average 5.238095238095238) internal successors, (110), 20 states have internal predecessors, (110), 20 states have call successors, (20), 20 states have call predecessors, (20), 18 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-02 22:23:10,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:23:10,615 INFO L93 Difference]: Finished difference Result 157 states and 158 transitions. [2021-05-02 22:23:10,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-02 22:23:10,616 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.238095238095238) internal successors, (110), 20 states have internal predecessors, (110), 20 states have call successors, (20), 20 states have call predecessors, (20), 18 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Word has length 148 [2021-05-02 22:23:10,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:23:10,616 INFO L225 Difference]: With dead ends: 157 [2021-05-02 22:23:10,616 INFO L226 Difference]: Without dead ends: 157 [2021-05-02 22:23:10,617 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 360.2ms TimeCoverageRelationStatistics Valid=532, Invalid=874, Unknown=0, NotChecked=0, Total=1406 [2021-05-02 22:23:10,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-05-02 22:23:10,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2021-05-02 22:23:10,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 116 states have (on average 1.0172413793103448) internal successors, (118), 116 states have internal predecessors, (118), 21 states have call successors, (21), 21 states have call predecessors, (21), 19 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2021-05-02 22:23:10,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 158 transitions. [2021-05-02 22:23:10,620 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 158 transitions. Word has length 148 [2021-05-02 22:23:10,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:23:10,620 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 158 transitions. [2021-05-02 22:23:10,620 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.238095238095238) internal successors, (110), 20 states have internal predecessors, (110), 20 states have call successors, (20), 20 states have call predecessors, (20), 18 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-02 22:23:10,620 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 158 transitions. [2021-05-02 22:23:10,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-05-02 22:23:10,621 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:23:10,621 INFO L523 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 18, 18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:23:10,824 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:23:10,825 INFO L428 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:23:10,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:23:10,825 INFO L82 PathProgramCache]: Analyzing trace with hash 75778898, now seen corresponding path program 17 times [2021-05-02 22:23:10,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:23:10,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147204506] [2021-05-02 22:23:10,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:23:10,842 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:23:10,842 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1331508902] [2021-05-02 22:23:10,842 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:23:11,372 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-05-02 22:23:11,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:23:11,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 85 conjunts are in the unsatisfiable core [2021-05-02 22:23:11,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:23:11,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:11,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:11,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:11,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:11,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:11,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:11,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:11,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:11,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:11,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:11,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:11,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:11,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:11,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:11,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:11,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:11,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:11,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:11,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:11,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:11,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:11,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:11,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:11,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:11,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:11,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:11,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:11,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:11,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:11,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:11,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:11,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:11,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:11,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:11,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:11,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:11,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:12,034 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 41 proven. 658 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2021-05-02 22:23:12,034 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:23:12,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147204506] [2021-05-02 22:23:12,034 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:23:12,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331508902] [2021-05-02 22:23:12,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331508902] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:23:12,035 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:23:12,035 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2021-05-02 22:23:12,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667614254] [2021-05-02 22:23:12,035 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-02 22:23:12,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:23:12,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-02 22:23:12,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=552, Unknown=0, NotChecked=0, Total=600 [2021-05-02 22:23:12,036 INFO L87 Difference]: Start difference. First operand 157 states and 158 transitions. Second operand has 25 states, 24 states have (on average 2.75) internal successors, (66), 24 states have internal predecessors, (66), 20 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2021-05-02 22:23:12,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:23:12,591 INFO L93 Difference]: Finished difference Result 162 states and 164 transitions. [2021-05-02 22:23:12,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-02 22:23:12,591 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.75) internal successors, (66), 24 states have internal predecessors, (66), 20 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) Word has length 154 [2021-05-02 22:23:12,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:23:12,592 INFO L225 Difference]: With dead ends: 162 [2021-05-02 22:23:12,592 INFO L226 Difference]: Without dead ends: 159 [2021-05-02 22:23:12,592 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 444.2ms TimeCoverageRelationStatistics Valid=63, Invalid=693, Unknown=0, NotChecked=0, Total=756 [2021-05-02 22:23:12,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-05-02 22:23:12,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2021-05-02 22:23:12,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 117 states have (on average 1.017094017094017) internal successors, (119), 117 states have internal predecessors, (119), 22 states have call successors, (22), 21 states have call predecessors, (22), 19 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-05-02 22:23:12,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 161 transitions. [2021-05-02 22:23:12,596 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 161 transitions. Word has length 154 [2021-05-02 22:23:12,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:23:12,596 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 161 transitions. [2021-05-02 22:23:12,596 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 24 states have (on average 2.75) internal successors, (66), 24 states have internal predecessors, (66), 20 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2021-05-02 22:23:12,596 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 161 transitions. [2021-05-02 22:23:12,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-05-02 22:23:12,597 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:23:12,597 INFO L523 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:23:12,803 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-05-02 22:23:12,803 INFO L428 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:23:12,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:23:12,803 INFO L82 PathProgramCache]: Analyzing trace with hash 664967093, now seen corresponding path program 18 times [2021-05-02 22:23:12,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:23:12,803 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304598930] [2021-05-02 22:23:12,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:23:12,809 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:23:12,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [915785140] [2021-05-02 22:23:12,809 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:23:13,431 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-05-02 22:23:13,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:23:13,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-02 22:23:13,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:23:13,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:13,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:13,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:13,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:13,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:13,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:13,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:13,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:13,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:13,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:13,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:13,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:13,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:13,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:13,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:13,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:13,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:13,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:13,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:13,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:13,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:13,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:13,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:13,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:13,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:13,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:13,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:13,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:13,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:13,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:13,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:13,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:13,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:13,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:13,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:13,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:13,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:13,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:13,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:13,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:13,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:13,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:13,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:13,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:13,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:13,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:13,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:13,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:13,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:13,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:13,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:13,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:13,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:13,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:13,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:13,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:13,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:13,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:13,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:13,854 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 36 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 22:23:13,854 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:23:13,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304598930] [2021-05-02 22:23:13,854 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:23:13,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915785140] [2021-05-02 22:23:13,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915785140] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:23:13,854 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:23:13,855 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2021-05-02 22:23:13,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685183998] [2021-05-02 22:23:13,855 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-02 22:23:13,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:23:13,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-02 22:23:13,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2021-05-02 22:23:13,855 INFO L87 Difference]: Start difference. First operand 159 states and 161 transitions. Second operand has 22 states, 22 states have (on average 5.2727272727272725) internal successors, (116), 21 states have internal predecessors, (116), 21 states have call successors, (21), 21 states have call predecessors, (21), 19 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2021-05-02 22:23:14,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:23:14,225 INFO L93 Difference]: Finished difference Result 165 states and 166 transitions. [2021-05-02 22:23:14,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-02 22:23:14,226 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.2727272727272725) internal successors, (116), 21 states have internal predecessors, (116), 21 states have call successors, (21), 21 states have call predecessors, (21), 19 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) Word has length 156 [2021-05-02 22:23:14,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:23:14,227 INFO L225 Difference]: With dead ends: 165 [2021-05-02 22:23:14,227 INFO L226 Difference]: Without dead ends: 165 [2021-05-02 22:23:14,227 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 398.2ms TimeCoverageRelationStatistics Valid=590, Invalid=970, Unknown=0, NotChecked=0, Total=1560 [2021-05-02 22:23:14,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-05-02 22:23:14,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2021-05-02 22:23:14,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 122 states have (on average 1.0163934426229508) internal successors, (124), 122 states have internal predecessors, (124), 22 states have call successors, (22), 22 states have call predecessors, (22), 20 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-05-02 22:23:14,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 166 transitions. [2021-05-02 22:23:14,231 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 166 transitions. Word has length 156 [2021-05-02 22:23:14,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:23:14,231 INFO L480 AbstractCegarLoop]: Abstraction has 165 states and 166 transitions. [2021-05-02 22:23:14,231 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.2727272727272725) internal successors, (116), 21 states have internal predecessors, (116), 21 states have call successors, (21), 21 states have call predecessors, (21), 19 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2021-05-02 22:23:14,231 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 166 transitions. [2021-05-02 22:23:14,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-05-02 22:23:14,232 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:23:14,232 INFO L523 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 19, 19, 19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:23:14,438 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:23:14,439 INFO L428 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:23:14,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:23:14,439 INFO L82 PathProgramCache]: Analyzing trace with hash 1531430707, now seen corresponding path program 18 times [2021-05-02 22:23:14,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:23:14,439 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923795895] [2021-05-02 22:23:14,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:23:14,444 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:23:14,444 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1917741670] [2021-05-02 22:23:14,444 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:23:15,361 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-05-02 22:23:15,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:23:15,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 91 conjunts are in the unsatisfiable core [2021-05-02 22:23:15,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:23:15,632 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 6 [2021-05-02 22:23:15,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:15,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:15,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:15,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:15,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:15,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:15,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:15,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:15,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:15,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:15,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:15,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:16,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:16,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:16,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:16,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:16,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:16,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:16,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:16,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:16,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:16,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:16,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:16,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:16,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:16,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:16,203 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 37 proven. 739 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2021-05-02 22:23:16,203 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:23:16,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923795895] [2021-05-02 22:23:16,204 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:23:16,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917741670] [2021-05-02 22:23:16,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917741670] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:23:16,204 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:23:16,204 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2021-05-02 22:23:16,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520620161] [2021-05-02 22:23:16,204 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-02 22:23:16,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:23:16,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-02 22:23:16,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=649, Unknown=0, NotChecked=0, Total=702 [2021-05-02 22:23:16,205 INFO L87 Difference]: Start difference. First operand 165 states and 166 transitions. Second operand has 27 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 21 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-05-02 22:23:18,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:23:18,925 INFO L93 Difference]: Finished difference Result 170 states and 172 transitions. [2021-05-02 22:23:18,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-02 22:23:18,925 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 21 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Word has length 162 [2021-05-02 22:23:18,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:23:18,926 INFO L225 Difference]: With dead ends: 170 [2021-05-02 22:23:18,926 INFO L226 Difference]: Without dead ends: 167 [2021-05-02 22:23:18,926 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 623.9ms TimeCoverageRelationStatistics Valid=68, Invalid=802, Unknown=0, NotChecked=0, Total=870 [2021-05-02 22:23:18,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-05-02 22:23:18,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2021-05-02 22:23:18,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 123 states have (on average 1.016260162601626) internal successors, (125), 123 states have internal predecessors, (125), 23 states have call successors, (23), 22 states have call predecessors, (23), 20 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 22:23:18,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 169 transitions. [2021-05-02 22:23:18,930 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 169 transitions. Word has length 162 [2021-05-02 22:23:18,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:23:18,931 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 169 transitions. [2021-05-02 22:23:18,931 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 21 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-05-02 22:23:18,931 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 169 transitions. [2021-05-02 22:23:18,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-05-02 22:23:18,932 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:23:18,932 INFO L523 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:23:19,138 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-05-02 22:23:19,138 INFO L428 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:23:19,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:23:19,138 INFO L82 PathProgramCache]: Analyzing trace with hash -612982954, now seen corresponding path program 19 times [2021-05-02 22:23:19,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:23:19,139 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624093544] [2021-05-02 22:23:19,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:23:19,147 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:23:19,147 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [188693673] [2021-05-02 22:23:19,147 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:23:19,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:23:19,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 504 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-02 22:23:19,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:23:19,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:19,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:19,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:19,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:19,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:19,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:19,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:19,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:19,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:19,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:19,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:19,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:19,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:19,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:19,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:19,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:19,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:19,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:19,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:19,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:19,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:19,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:19,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:19,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:19,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:19,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:19,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:19,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:19,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:19,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:19,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:19,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:19,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:19,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:19,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:19,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:19,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:19,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:19,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:19,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:19,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:19,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:19,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:19,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:19,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:19,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:19,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:19,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:19,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:19,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:19,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:19,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:19,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:19,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:19,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:19,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:19,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:19,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:19,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:19,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:19,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:19,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:19,728 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 38 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 22:23:19,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:23:19,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624093544] [2021-05-02 22:23:19,728 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:23:19,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188693673] [2021-05-02 22:23:19,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188693673] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:23:19,729 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:23:19,729 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2021-05-02 22:23:19,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260335374] [2021-05-02 22:23:19,729 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-02 22:23:19,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:23:19,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-02 22:23:19,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2021-05-02 22:23:19,730 INFO L87 Difference]: Start difference. First operand 167 states and 169 transitions. Second operand has 23 states, 23 states have (on average 5.304347826086956) internal successors, (122), 22 states have internal predecessors, (122), 22 states have call successors, (22), 22 states have call predecessors, (22), 20 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-05-02 22:23:20,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:23:20,189 INFO L93 Difference]: Finished difference Result 173 states and 174 transitions. [2021-05-02 22:23:20,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-02 22:23:20,190 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.304347826086956) internal successors, (122), 22 states have internal predecessors, (122), 22 states have call successors, (22), 22 states have call predecessors, (22), 20 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Word has length 164 [2021-05-02 22:23:20,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:23:20,191 INFO L225 Difference]: With dead ends: 173 [2021-05-02 22:23:20,191 INFO L226 Difference]: Without dead ends: 173 [2021-05-02 22:23:20,191 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 503.3ms TimeCoverageRelationStatistics Valid=651, Invalid=1071, Unknown=0, NotChecked=0, Total=1722 [2021-05-02 22:23:20,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-05-02 22:23:20,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2021-05-02 22:23:20,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 128 states have (on average 1.015625) internal successors, (130), 128 states have internal predecessors, (130), 23 states have call successors, (23), 23 states have call predecessors, (23), 21 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 22:23:20,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 174 transitions. [2021-05-02 22:23:20,194 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 174 transitions. Word has length 164 [2021-05-02 22:23:20,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:23:20,195 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 174 transitions. [2021-05-02 22:23:20,195 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.304347826086956) internal successors, (122), 22 states have internal predecessors, (122), 22 states have call successors, (22), 22 states have call predecessors, (22), 20 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-05-02 22:23:20,195 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 174 transitions. [2021-05-02 22:23:20,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-05-02 22:23:20,196 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:23:20,196 INFO L523 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 20, 20, 20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:23:20,396 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:23:20,396 INFO L428 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:23:20,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:23:20,397 INFO L82 PathProgramCache]: Analyzing trace with hash 1887818260, now seen corresponding path program 19 times [2021-05-02 22:23:20,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:23:20,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061509033] [2021-05-02 22:23:20,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:23:20,403 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:23:20,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [31989466] [2021-05-02 22:23:20,403 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:23:21,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:23:21,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 92 conjunts are in the unsatisfiable core [2021-05-02 22:23:21,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:23:21,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:21,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:21,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:21,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:21,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:21,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:21,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:21,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:21,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:21,748 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 39 proven. 818 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2021-05-02 22:23:21,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:23:21,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061509033] [2021-05-02 22:23:21,748 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:23:21,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31989466] [2021-05-02 22:23:21,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31989466] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:23:21,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:23:21,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2021-05-02 22:23:21,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885857836] [2021-05-02 22:23:21,749 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-02 22:23:21,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:23:21,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-02 22:23:21,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=650, Unknown=0, NotChecked=0, Total=702 [2021-05-02 22:23:21,750 INFO L87 Difference]: Start difference. First operand 173 states and 174 transitions. Second operand has 27 states, 26 states have (on average 2.769230769230769) internal successors, (72), 26 states have internal predecessors, (72), 22 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 22:23:22,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:23:22,440 INFO L93 Difference]: Finished difference Result 178 states and 180 transitions. [2021-05-02 22:23:22,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-02 22:23:22,441 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.769230769230769) internal successors, (72), 26 states have internal predecessors, (72), 22 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) Word has length 170 [2021-05-02 22:23:22,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:23:22,442 INFO L225 Difference]: With dead ends: 178 [2021-05-02 22:23:22,442 INFO L226 Difference]: Without dead ends: 175 [2021-05-02 22:23:22,442 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 143 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 523.0ms TimeCoverageRelationStatistics Valid=67, Invalid=803, Unknown=0, NotChecked=0, Total=870 [2021-05-02 22:23:22,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-05-02 22:23:22,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2021-05-02 22:23:22,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 129 states have (on average 1.0155038759689923) internal successors, (131), 129 states have internal predecessors, (131), 24 states have call successors, (24), 23 states have call predecessors, (24), 21 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-05-02 22:23:22,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 177 transitions. [2021-05-02 22:23:22,445 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 177 transitions. Word has length 170 [2021-05-02 22:23:22,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:23:22,446 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 177 transitions. [2021-05-02 22:23:22,446 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 26 states have (on average 2.769230769230769) internal successors, (72), 26 states have internal predecessors, (72), 22 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 22:23:22,446 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 177 transitions. [2021-05-02 22:23:22,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-05-02 22:23:22,447 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:23:22,447 INFO L523 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:23:22,652 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:23:22,652 INFO L428 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:23:22,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:23:22,653 INFO L82 PathProgramCache]: Analyzing trace with hash -1721928201, now seen corresponding path program 20 times [2021-05-02 22:23:22,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:23:22,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326149897] [2021-05-02 22:23:22,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:23:22,658 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:23:22,659 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1351989327] [2021-05-02 22:23:22,659 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:23:22,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 22:23:22,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:23:22,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-02 22:23:22,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:23:22,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:22,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:22,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:22,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:22,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:22,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:22,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:22,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:22,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:22,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:22,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:22,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:22,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:22,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:22,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:22,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:22,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:22,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:22,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:22,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:22,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:22,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:22,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:22,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:22,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:22,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:22,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:22,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:22,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:22,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:22,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:22,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:22,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:22,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:22,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:22,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:22,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:22,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:22,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:23,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:23,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:23,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:23,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:23,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:23,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:23,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:23,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:23,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:23,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:23,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:23,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:23,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:23,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:23,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:23,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:23,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:23,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:23,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:23,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:23,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:23,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:23,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:23,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:23,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:23,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:23,282 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 40 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 22:23:23,282 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:23:23,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326149897] [2021-05-02 22:23:23,282 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:23:23,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351989327] [2021-05-02 22:23:23,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351989327] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:23:23,283 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:23:23,283 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2021-05-02 22:23:23,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624023420] [2021-05-02 22:23:23,283 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-02 22:23:23,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:23:23,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-02 22:23:23,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2021-05-02 22:23:23,284 INFO L87 Difference]: Start difference. First operand 175 states and 177 transitions. Second operand has 24 states, 24 states have (on average 5.333333333333333) internal successors, (128), 23 states have internal predecessors, (128), 23 states have call successors, (23), 23 states have call predecessors, (23), 21 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 22:23:25,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:23:25,747 INFO L93 Difference]: Finished difference Result 181 states and 182 transitions. [2021-05-02 22:23:25,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-02 22:23:25,747 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.333333333333333) internal successors, (128), 23 states have internal predecessors, (128), 23 states have call successors, (23), 23 states have call predecessors, (23), 21 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) Word has length 172 [2021-05-02 22:23:25,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:23:25,748 INFO L225 Difference]: With dead ends: 181 [2021-05-02 22:23:25,748 INFO L226 Difference]: Without dead ends: 181 [2021-05-02 22:23:25,748 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 525.4ms TimeCoverageRelationStatistics Valid=715, Invalid=1177, Unknown=0, NotChecked=0, Total=1892 [2021-05-02 22:23:25,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-05-02 22:23:25,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2021-05-02 22:23:25,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 134 states have (on average 1.0149253731343284) internal successors, (136), 134 states have internal predecessors, (136), 24 states have call successors, (24), 24 states have call predecessors, (24), 22 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-05-02 22:23:25,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 182 transitions. [2021-05-02 22:23:25,756 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 182 transitions. Word has length 172 [2021-05-02 22:23:25,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:23:25,756 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 182 transitions. [2021-05-02 22:23:25,756 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.333333333333333) internal successors, (128), 23 states have internal predecessors, (128), 23 states have call successors, (23), 23 states have call predecessors, (23), 21 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 22:23:25,756 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 182 transitions. [2021-05-02 22:23:25,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-05-02 22:23:25,757 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:23:25,757 INFO L523 BasicCegarLoop]: trace histogram [22, 21, 21, 21, 21, 21, 21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:23:25,979 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-05-02 22:23:25,979 INFO L428 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:23:25,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:23:25,980 INFO L82 PathProgramCache]: Analyzing trace with hash 1681878005, now seen corresponding path program 20 times [2021-05-02 22:23:25,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:23:25,980 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331023481] [2021-05-02 22:23:25,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:23:25,985 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:23:25,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1575838393] [2021-05-02 22:23:25,985 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:23:27,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 22:23:27,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:23:27,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 96 conjunts are in the unsatisfiable core [2021-05-02 22:23:27,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:23:27,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:27,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:27,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:27,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:27,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:27,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:27,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:27,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:27,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:27,654 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 41 proven. 901 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2021-05-02 22:23:27,654 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:23:27,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331023481] [2021-05-02 22:23:27,654 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:23:27,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575838393] [2021-05-02 22:23:27,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575838393] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:23:27,655 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:23:27,655 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2021-05-02 22:23:27,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359229516] [2021-05-02 22:23:27,655 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-02 22:23:27,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:23:27,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-02 22:23:27,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=702, Unknown=0, NotChecked=0, Total=756 [2021-05-02 22:23:27,656 INFO L87 Difference]: Start difference. First operand 181 states and 182 transitions. Second operand has 28 states, 27 states have (on average 2.7777777777777777) internal successors, (75), 27 states have internal predecessors, (75), 23 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-05-02 22:23:28,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:23:28,381 INFO L93 Difference]: Finished difference Result 186 states and 188 transitions. [2021-05-02 22:23:28,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-02 22:23:28,381 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.7777777777777777) internal successors, (75), 27 states have internal predecessors, (75), 23 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Word has length 178 [2021-05-02 22:23:28,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:23:28,382 INFO L225 Difference]: With dead ends: 186 [2021-05-02 22:23:28,383 INFO L226 Difference]: Without dead ends: 183 [2021-05-02 22:23:28,383 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 150 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 456.9ms TimeCoverageRelationStatistics Valid=69, Invalid=861, Unknown=0, NotChecked=0, Total=930 [2021-05-02 22:23:28,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-05-02 22:23:28,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2021-05-02 22:23:28,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 135 states have (on average 1.0148148148148148) internal successors, (137), 135 states have internal predecessors, (137), 25 states have call successors, (25), 24 states have call predecessors, (25), 22 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2021-05-02 22:23:28,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 185 transitions. [2021-05-02 22:23:28,386 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 185 transitions. Word has length 178 [2021-05-02 22:23:28,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:23:28,386 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 185 transitions. [2021-05-02 22:23:28,387 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 27 states have (on average 2.7777777777777777) internal successors, (75), 27 states have internal predecessors, (75), 23 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-05-02 22:23:28,387 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 185 transitions. [2021-05-02 22:23:28,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-05-02 22:23:28,387 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:23:28,388 INFO L523 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:23:28,593 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:23:28,593 INFO L428 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:23:28,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:23:28,593 INFO L82 PathProgramCache]: Analyzing trace with hash -2062017640, now seen corresponding path program 21 times [2021-05-02 22:23:28,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:23:28,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888328753] [2021-05-02 22:23:28,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:23:28,598 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:23:28,598 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1211152375] [2021-05-02 22:23:28,598 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:23:29,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2021-05-02 22:23:29,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:23:29,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-02 22:23:29,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:23:29,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:29,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:29,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:29,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:29,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:29,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:29,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:29,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:29,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:30,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:30,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:30,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:30,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:30,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:30,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:30,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:30,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:30,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:30,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:30,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:30,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:30,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:30,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:30,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:30,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:30,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:30,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:30,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:30,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:30,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:30,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:30,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:30,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:30,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:30,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:30,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:30,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:30,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:30,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:30,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:30,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:30,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:30,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:30,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:30,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:30,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:30,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:30,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:30,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:30,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:30,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:30,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:30,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:30,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:30,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:30,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:30,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:30,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:30,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:30,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:30,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:30,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:30,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:30,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:30,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:30,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:30,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:30,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:30,464 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 42 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 22:23:30,464 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:23:30,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888328753] [2021-05-02 22:23:30,464 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:23:30,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211152375] [2021-05-02 22:23:30,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211152375] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:23:30,464 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:23:30,464 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2021-05-02 22:23:30,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744948070] [2021-05-02 22:23:30,465 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-02 22:23:30,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:23:30,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-02 22:23:30,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2021-05-02 22:23:30,465 INFO L87 Difference]: Start difference. First operand 183 states and 185 transitions. Second operand has 25 states, 25 states have (on average 5.36) internal successors, (134), 24 states have internal predecessors, (134), 24 states have call successors, (24), 24 states have call predecessors, (24), 22 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-05-02 22:23:30,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:23:30,927 INFO L93 Difference]: Finished difference Result 189 states and 190 transitions. [2021-05-02 22:23:30,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-02 22:23:30,927 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.36) internal successors, (134), 24 states have internal predecessors, (134), 24 states have call successors, (24), 24 states have call predecessors, (24), 22 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Word has length 180 [2021-05-02 22:23:30,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:23:30,928 INFO L225 Difference]: With dead ends: 189 [2021-05-02 22:23:30,928 INFO L226 Difference]: Without dead ends: 189 [2021-05-02 22:23:30,929 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 532.1ms TimeCoverageRelationStatistics Valid=782, Invalid=1288, Unknown=0, NotChecked=0, Total=2070 [2021-05-02 22:23:30,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-05-02 22:23:30,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2021-05-02 22:23:30,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 140 states have (on average 1.0142857142857142) internal successors, (142), 140 states have internal predecessors, (142), 25 states have call successors, (25), 25 states have call predecessors, (25), 23 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2021-05-02 22:23:30,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 190 transitions. [2021-05-02 22:23:30,932 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 190 transitions. Word has length 180 [2021-05-02 22:23:30,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:23:30,932 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 190 transitions. [2021-05-02 22:23:30,932 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.36) internal successors, (134), 24 states have internal predecessors, (134), 24 states have call successors, (24), 24 states have call predecessors, (24), 22 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-05-02 22:23:30,933 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 190 transitions. [2021-05-02 22:23:30,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2021-05-02 22:23:30,933 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:23:30,933 INFO L523 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 22, 22, 22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:23:31,139 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-05-02 22:23:31,139 INFO L428 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:23:31,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:23:31,140 INFO L82 PathProgramCache]: Analyzing trace with hash -982149930, now seen corresponding path program 21 times [2021-05-02 22:23:31,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:23:31,140 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821698867] [2021-05-02 22:23:31,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:23:31,146 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:23:31,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1706324727] [2021-05-02 22:23:31,146 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:23:32,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2021-05-02 22:23:32,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:23:32,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 556 conjuncts, 103 conjunts are in the unsatisfiable core [2021-05-02 22:23:32,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:23:32,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:32,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:32,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:32,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:32,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:32,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:32,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:32,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:32,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:32,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:32,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:32,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:32,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:32,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:32,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:32,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:32,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:32,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:32,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:32,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:32,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:32,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:32,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:32,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:32,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:32,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:32,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:32,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:32,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:32,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:32,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:32,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:32,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:32,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:32,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:32,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:33,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:33,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:33,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:33,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:33,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:33,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:33,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:33,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:33,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:33,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:33,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:33,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:23:33,184 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 43 proven. 988 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked. [2021-05-02 22:23:33,184 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:23:33,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821698867] [2021-05-02 22:23:33,184 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:23:33,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706324727] [2021-05-02 22:23:33,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706324727] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:23:33,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:23:33,184 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2021-05-02 22:23:33,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994746270] [2021-05-02 22:23:33,185 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-02 22:23:33,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:23:33,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-02 22:23:33,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=811, Unknown=0, NotChecked=0, Total=870 [2021-05-02 22:23:33,186 INFO L87 Difference]: Start difference. First operand 189 states and 190 transitions. Second operand has 30 states, 29 states have (on average 2.689655172413793) internal successors, (78), 28 states have internal predecessors, (78), 24 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2021-05-02 22:24:14,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:24:14,291 INFO L93 Difference]: Finished difference Result 194 states and 196 transitions. [2021-05-02 22:24:14,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-02 22:24:14,291 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.689655172413793) internal successors, (78), 28 states have internal predecessors, (78), 24 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) Word has length 186 [2021-05-02 22:24:14,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:24:14,292 INFO L225 Difference]: With dead ends: 194 [2021-05-02 22:24:14,292 INFO L226 Difference]: Without dead ends: 191 [2021-05-02 22:24:14,292 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 518.5ms TimeCoverageRelationStatistics Valid=74, Invalid=982, Unknown=0, NotChecked=0, Total=1056 [2021-05-02 22:24:14,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-05-02 22:24:14,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2021-05-02 22:24:14,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 141 states have (on average 1.0141843971631206) internal successors, (143), 141 states have internal predecessors, (143), 26 states have call successors, (26), 25 states have call predecessors, (26), 23 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2021-05-02 22:24:14,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 193 transitions. [2021-05-02 22:24:14,296 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 193 transitions. Word has length 186 [2021-05-02 22:24:14,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:24:14,296 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 193 transitions. [2021-05-02 22:24:14,296 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 29 states have (on average 2.689655172413793) internal successors, (78), 28 states have internal predecessors, (78), 24 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2021-05-02 22:24:14,296 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 193 transitions. [2021-05-02 22:24:14,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-05-02 22:24:14,297 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:24:14,297 INFO L523 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:24:14,503 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:24:14,504 INFO L428 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:24:14,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:24:14,504 INFO L82 PathProgramCache]: Analyzing trace with hash 1902612537, now seen corresponding path program 22 times [2021-05-02 22:24:14,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:24:14,504 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254815862] [2021-05-02 22:24:14,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:24:14,509 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:24:14,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [841000356] [2021-05-02 22:24:14,509 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:24:15,876 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 22:24:15,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:24:15,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 567 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-02 22:24:15,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:24:15,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:15,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:15,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:15,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:15,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:15,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:15,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:15,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:15,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:15,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:15,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:15,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:15,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:15,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:15,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:15,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:15,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:15,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:15,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:15,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:15,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:15,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:15,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:15,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:16,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:16,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:16,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:16,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:16,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:16,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:16,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:16,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:16,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:16,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:16,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:16,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:16,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:16,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:16,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:16,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:16,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:16,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:16,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:16,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:16,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:16,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:16,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:16,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:16,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:16,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:16,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:16,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:16,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:16,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:16,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:16,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:16,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:16,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:16,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:16,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:16,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:16,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:16,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:16,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:16,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:16,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:16,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:16,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:16,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:16,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:16,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:16,392 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 44 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 22:24:16,393 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:24:16,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254815862] [2021-05-02 22:24:16,393 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:24:16,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841000356] [2021-05-02 22:24:16,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841000356] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:24:16,393 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:24:16,393 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2021-05-02 22:24:16,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268814181] [2021-05-02 22:24:16,393 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-02 22:24:16,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:24:16,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-02 22:24:16,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2021-05-02 22:24:16,394 INFO L87 Difference]: Start difference. First operand 191 states and 193 transitions. Second operand has 26 states, 26 states have (on average 5.384615384615385) internal successors, (140), 25 states have internal predecessors, (140), 25 states have call successors, (25), 25 states have call predecessors, (25), 23 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2021-05-02 22:24:16,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:24:16,970 INFO L93 Difference]: Finished difference Result 197 states and 198 transitions. [2021-05-02 22:24:16,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-02 22:24:16,971 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.384615384615385) internal successors, (140), 25 states have internal predecessors, (140), 25 states have call successors, (25), 25 states have call predecessors, (25), 23 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) Word has length 188 [2021-05-02 22:24:16,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:24:16,972 INFO L225 Difference]: With dead ends: 197 [2021-05-02 22:24:16,972 INFO L226 Difference]: Without dead ends: 197 [2021-05-02 22:24:16,973 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 547.2ms TimeCoverageRelationStatistics Valid=852, Invalid=1404, Unknown=0, NotChecked=0, Total=2256 [2021-05-02 22:24:16,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-05-02 22:24:16,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2021-05-02 22:24:16,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 146 states have (on average 1.0136986301369864) internal successors, (148), 146 states have internal predecessors, (148), 26 states have call successors, (26), 26 states have call predecessors, (26), 24 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2021-05-02 22:24:16,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 198 transitions. [2021-05-02 22:24:16,976 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 198 transitions. Word has length 188 [2021-05-02 22:24:16,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:24:16,976 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 198 transitions. [2021-05-02 22:24:16,976 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 5.384615384615385) internal successors, (140), 25 states have internal predecessors, (140), 25 states have call successors, (25), 25 states have call predecessors, (25), 23 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2021-05-02 22:24:16,977 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 198 transitions. [2021-05-02 22:24:16,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-05-02 22:24:16,977 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:24:16,978 INFO L523 BasicCegarLoop]: trace histogram [24, 23, 23, 23, 23, 23, 23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:24:17,183 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-05-02 22:24:17,183 INFO L428 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:24:17,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:24:17,184 INFO L82 PathProgramCache]: Analyzing trace with hash -1842787145, now seen corresponding path program 22 times [2021-05-02 22:24:17,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:24:17,184 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15234837] [2021-05-02 22:24:17,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:24:17,188 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:24:17,188 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [645270281] [2021-05-02 22:24:17,188 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:24:18,776 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 22:24:18,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:24:18,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 577 conjuncts, 104 conjunts are in the unsatisfiable core [2021-05-02 22:24:18,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:24:18,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:19,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:19,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:19,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:19,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:19,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:19,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:19,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:19,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:19,458 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 45 proven. 1079 refuted. 0 times theorem prover too weak. 946 trivial. 0 not checked. [2021-05-02 22:24:19,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:24:19,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15234837] [2021-05-02 22:24:19,458 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:24:19,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645270281] [2021-05-02 22:24:19,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645270281] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:24:19,459 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:24:19,459 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2021-05-02 22:24:19,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142655180] [2021-05-02 22:24:19,459 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-02 22:24:19,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:24:19,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-02 22:24:19,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=812, Unknown=0, NotChecked=0, Total=870 [2021-05-02 22:24:19,460 INFO L87 Difference]: Start difference. First operand 197 states and 198 transitions. Second operand has 30 states, 29 states have (on average 2.793103448275862) internal successors, (81), 29 states have internal predecessors, (81), 25 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2021-05-02 22:24:20,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:24:20,307 INFO L93 Difference]: Finished difference Result 202 states and 204 transitions. [2021-05-02 22:24:20,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-02 22:24:20,307 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.793103448275862) internal successors, (81), 29 states have internal predecessors, (81), 25 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) Word has length 194 [2021-05-02 22:24:20,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:24:20,308 INFO L225 Difference]: With dead ends: 202 [2021-05-02 22:24:20,308 INFO L226 Difference]: Without dead ends: 199 [2021-05-02 22:24:20,309 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 164 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 482.5ms TimeCoverageRelationStatistics Valid=73, Invalid=983, Unknown=0, NotChecked=0, Total=1056 [2021-05-02 22:24:20,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-05-02 22:24:20,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2021-05-02 22:24:20,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 147 states have (on average 1.0136054421768708) internal successors, (149), 147 states have internal predecessors, (149), 27 states have call successors, (27), 26 states have call predecessors, (27), 24 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2021-05-02 22:24:20,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 201 transitions. [2021-05-02 22:24:20,312 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 201 transitions. Word has length 194 [2021-05-02 22:24:20,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:24:20,312 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 201 transitions. [2021-05-02 22:24:20,312 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 29 states have (on average 2.793103448275862) internal successors, (81), 29 states have internal predecessors, (81), 25 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2021-05-02 22:24:20,312 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 201 transitions. [2021-05-02 22:24:20,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2021-05-02 22:24:20,313 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:24:20,313 INFO L523 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:24:20,514 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:24:20,514 INFO L428 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:24:20,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:24:20,514 INFO L82 PathProgramCache]: Analyzing trace with hash -536030246, now seen corresponding path program 23 times [2021-05-02 22:24:20,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:24:20,514 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386358519] [2021-05-02 22:24:20,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:24:20,519 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:24:20,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1318195629] [2021-05-02 22:24:20,519 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:24:21,107 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2021-05-02 22:24:21,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:24:21,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 588 conjuncts, 51 conjunts are in the unsatisfiable core [2021-05-02 22:24:21,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:24:21,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:21,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:21,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:21,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:21,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:21,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:21,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:21,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:21,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:21,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:21,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:21,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:21,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:21,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:21,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:21,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:21,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:21,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:21,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:21,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:21,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:21,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:21,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:21,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:21,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:21,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:21,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:21,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:21,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:21,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:21,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:21,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:21,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:21,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:21,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:21,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:21,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:21,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:21,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:21,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:21,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:21,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:21,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:21,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:21,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:21,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:21,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:21,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:21,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:21,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:21,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:21,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:21,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:21,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:21,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:21,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:21,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:21,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:21,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:21,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:21,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:21,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:21,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:21,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:21,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:21,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:21,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:21,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:21,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:21,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:21,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:21,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:21,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:21,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:21,754 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 46 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 22:24:21,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:24:21,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386358519] [2021-05-02 22:24:21,754 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:24:21,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318195629] [2021-05-02 22:24:21,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318195629] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:24:21,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:24:21,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2021-05-02 22:24:21,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044098033] [2021-05-02 22:24:21,754 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-02 22:24:21,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:24:21,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-02 22:24:21,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2021-05-02 22:24:21,755 INFO L87 Difference]: Start difference. First operand 199 states and 201 transitions. Second operand has 27 states, 27 states have (on average 5.407407407407407) internal successors, (146), 26 states have internal predecessors, (146), 26 states have call successors, (26), 26 states have call predecessors, (26), 24 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2021-05-02 22:24:22,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:24:22,341 INFO L93 Difference]: Finished difference Result 205 states and 206 transitions. [2021-05-02 22:24:22,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-05-02 22:24:22,341 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 5.407407407407407) internal successors, (146), 26 states have internal predecessors, (146), 26 states have call successors, (26), 26 states have call predecessors, (26), 24 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) Word has length 196 [2021-05-02 22:24:22,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:24:22,342 INFO L225 Difference]: With dead ends: 205 [2021-05-02 22:24:22,343 INFO L226 Difference]: Without dead ends: 205 [2021-05-02 22:24:22,343 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 655.0ms TimeCoverageRelationStatistics Valid=925, Invalid=1525, Unknown=0, NotChecked=0, Total=2450 [2021-05-02 22:24:22,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-05-02 22:24:22,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2021-05-02 22:24:22,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 152 states have (on average 1.013157894736842) internal successors, (154), 152 states have internal predecessors, (154), 27 states have call successors, (27), 27 states have call predecessors, (27), 25 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2021-05-02 22:24:22,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 206 transitions. [2021-05-02 22:24:22,346 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 206 transitions. Word has length 196 [2021-05-02 22:24:22,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:24:22,347 INFO L480 AbstractCegarLoop]: Abstraction has 205 states and 206 transitions. [2021-05-02 22:24:22,347 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 5.407407407407407) internal successors, (146), 26 states have internal predecessors, (146), 26 states have call successors, (26), 26 states have call predecessors, (26), 24 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2021-05-02 22:24:22,347 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 206 transitions. [2021-05-02 22:24:22,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2021-05-02 22:24:22,348 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:24:22,348 INFO L523 BasicCegarLoop]: trace histogram [25, 24, 24, 24, 24, 24, 24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:24:22,553 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:24:22,554 INFO L428 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:24:22,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:24:22,554 INFO L82 PathProgramCache]: Analyzing trace with hash 928748440, now seen corresponding path program 23 times [2021-05-02 22:24:22,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:24:22,555 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087961895] [2021-05-02 22:24:22,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:24:22,559 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:24:22,559 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1295981262] [2021-05-02 22:24:22,559 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:24:23,360 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2021-05-02 22:24:23,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:24:23,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 598 conjuncts, 109 conjunts are in the unsatisfiable core [2021-05-02 22:24:23,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:24:23,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:23,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:23,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:23,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:23,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:23,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:23,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:23,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:23,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:23,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:23,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:23,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:23,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:23,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:23,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:23,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:23,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:23,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:23,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:23,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:23,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:23,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:23,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:23,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:23,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:23,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:23,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:23,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:23,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:23,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:23,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:23,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:23,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:23,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:23,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:23,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:23,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:23,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:24,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:24,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:24,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:24,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:24,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:24,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:24,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:24,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:24,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:24,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:24,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:24,234 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 116 proven. 1105 refuted. 0 times theorem prover too weak. 1035 trivial. 0 not checked. [2021-05-02 22:24:24,234 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:24:24,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087961895] [2021-05-02 22:24:24,234 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:24:24,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295981262] [2021-05-02 22:24:24,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295981262] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:24:24,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:24:24,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2021-05-02 22:24:24,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631493148] [2021-05-02 22:24:24,235 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-02 22:24:24,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:24:24,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-02 22:24:24,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=870, Unknown=0, NotChecked=0, Total=930 [2021-05-02 22:24:24,236 INFO L87 Difference]: Start difference. First operand 205 states and 206 transitions. Second operand has 31 states, 30 states have (on average 2.8) internal successors, (84), 30 states have internal predecessors, (84), 26 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2021-05-02 22:24:25,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:24:25,015 INFO L93 Difference]: Finished difference Result 210 states and 212 transitions. [2021-05-02 22:24:25,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-02 22:24:25,015 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.8) internal successors, (84), 30 states have internal predecessors, (84), 26 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) Word has length 202 [2021-05-02 22:24:25,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:24:25,016 INFO L225 Difference]: With dead ends: 210 [2021-05-02 22:24:25,016 INFO L226 Difference]: Without dead ends: 207 [2021-05-02 22:24:25,016 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 171 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 587.0ms TimeCoverageRelationStatistics Valid=75, Invalid=1047, Unknown=0, NotChecked=0, Total=1122 [2021-05-02 22:24:25,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-05-02 22:24:25,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 207. [2021-05-02 22:24:25,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 153 states have (on average 1.0130718954248366) internal successors, (155), 153 states have internal predecessors, (155), 28 states have call successors, (28), 27 states have call predecessors, (28), 25 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2021-05-02 22:24:25,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 209 transitions. [2021-05-02 22:24:25,020 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 209 transitions. Word has length 202 [2021-05-02 22:24:25,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:24:25,020 INFO L480 AbstractCegarLoop]: Abstraction has 207 states and 209 transitions. [2021-05-02 22:24:25,020 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 30 states have (on average 2.8) internal successors, (84), 30 states have internal predecessors, (84), 26 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2021-05-02 22:24:25,020 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 209 transitions. [2021-05-02 22:24:25,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2021-05-02 22:24:25,021 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:24:25,021 INFO L523 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:24:25,228 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-05-02 22:24:25,228 INFO L428 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:24:25,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:24:25,228 INFO L82 PathProgramCache]: Analyzing trace with hash 29943419, now seen corresponding path program 24 times [2021-05-02 22:24:25,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:24:25,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378659009] [2021-05-02 22:24:25,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:24:25,233 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:24:25,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [249107188] [2021-05-02 22:24:25,233 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:24:26,664 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2021-05-02 22:24:26,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:24:26,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 609 conjuncts, 53 conjunts are in the unsatisfiable core [2021-05-02 22:24:26,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:24:26,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:26,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:26,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:26,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:26,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:26,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:26,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:26,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:26,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:26,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:26,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:26,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:26,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:26,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:26,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:26,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:26,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:26,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:26,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:26,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:26,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:26,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:26,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:26,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:26,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:26,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:26,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:26,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:26,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:26,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:26,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:26,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:26,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:26,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:26,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:26,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:26,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:26,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:26,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:26,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:26,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:26,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:26,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:26,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:26,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:26,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:26,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:26,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:27,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:27,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:27,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:27,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:27,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:27,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:27,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:27,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:27,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:27,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:27,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:27,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:27,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:27,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:27,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:27,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:27,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:27,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:27,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:27,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:27,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:27,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:27,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:27,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:27,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:27,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:27,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:27,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:27,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:27,342 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 48 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 22:24:27,342 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:24:27,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378659009] [2021-05-02 22:24:27,342 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:24:27,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249107188] [2021-05-02 22:24:27,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249107188] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:24:27,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:24:27,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2021-05-02 22:24:27,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612806282] [2021-05-02 22:24:27,343 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-02 22:24:27,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:24:27,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-02 22:24:27,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2021-05-02 22:24:27,344 INFO L87 Difference]: Start difference. First operand 207 states and 209 transitions. Second operand has 28 states, 28 states have (on average 5.428571428571429) internal successors, (152), 27 states have internal predecessors, (152), 27 states have call successors, (27), 27 states have call predecessors, (27), 25 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2021-05-02 22:24:29,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:24:29,965 INFO L93 Difference]: Finished difference Result 213 states and 214 transitions. [2021-05-02 22:24:29,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-05-02 22:24:29,966 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 5.428571428571429) internal successors, (152), 27 states have internal predecessors, (152), 27 states have call successors, (27), 27 states have call predecessors, (27), 25 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) Word has length 204 [2021-05-02 22:24:29,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:24:29,966 INFO L225 Difference]: With dead ends: 213 [2021-05-02 22:24:29,966 INFO L226 Difference]: Without dead ends: 213 [2021-05-02 22:24:29,967 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 679.6ms TimeCoverageRelationStatistics Valid=1001, Invalid=1651, Unknown=0, NotChecked=0, Total=2652 [2021-05-02 22:24:29,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-05-02 22:24:29,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 213. [2021-05-02 22:24:29,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 158 states have (on average 1.0126582278481013) internal successors, (160), 158 states have internal predecessors, (160), 28 states have call successors, (28), 28 states have call predecessors, (28), 26 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2021-05-02 22:24:29,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 214 transitions. [2021-05-02 22:24:29,970 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 214 transitions. Word has length 204 [2021-05-02 22:24:29,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:24:29,970 INFO L480 AbstractCegarLoop]: Abstraction has 213 states and 214 transitions. [2021-05-02 22:24:29,970 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 5.428571428571429) internal successors, (152), 27 states have internal predecessors, (152), 27 states have call successors, (27), 27 states have call predecessors, (27), 25 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2021-05-02 22:24:29,970 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 214 transitions. [2021-05-02 22:24:29,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2021-05-02 22:24:29,971 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:24:29,971 INFO L523 BasicCegarLoop]: trace histogram [26, 25, 25, 25, 25, 25, 25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:24:30,178 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:24:30,178 INFO L428 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:24:30,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:24:30,179 INFO L82 PathProgramCache]: Analyzing trace with hash -1861392007, now seen corresponding path program 24 times [2021-05-02 22:24:30,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:24:30,179 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810964937] [2021-05-02 22:24:30,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:24:30,183 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:24:30,183 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1043888795] [2021-05-02 22:24:30,183 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:24:32,224 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2021-05-02 22:24:32,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:24:32,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 619 conjuncts, 117 conjunts are in the unsatisfiable core [2021-05-02 22:24:32,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:24:32,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:32,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:32,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:32,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:32,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:32,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:32,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:32,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:32,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:32,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:32,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:32,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:32,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:32,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:32,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:32,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:32,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:32,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:32,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:32,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:32,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:32,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:32,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:32,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:32,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:32,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:33,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:33,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:33,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:33,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:33,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:33,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:33,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:33,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:33,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:33,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:33,145 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 52 proven. 1270 refuted. 0 times theorem prover too weak. 1128 trivial. 0 not checked. [2021-05-02 22:24:33,145 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:24:33,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810964937] [2021-05-02 22:24:33,146 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:24:33,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043888795] [2021-05-02 22:24:33,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043888795] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:24:33,146 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:24:33,146 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2021-05-02 22:24:33,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886330967] [2021-05-02 22:24:33,147 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-02 22:24:33,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:24:33,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-02 22:24:33,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=991, Unknown=0, NotChecked=0, Total=1056 [2021-05-02 22:24:33,147 INFO L87 Difference]: Start difference. First operand 213 states and 214 transitions. Second operand has 33 states, 32 states have (on average 2.71875) internal successors, (87), 31 states have internal predecessors, (87), 27 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2021-05-02 22:24:38,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:24:38,134 INFO L93 Difference]: Finished difference Result 218 states and 220 transitions. [2021-05-02 22:24:38,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-02 22:24:38,134 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.71875) internal successors, (87), 31 states have internal predecessors, (87), 27 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) Word has length 210 [2021-05-02 22:24:38,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:24:38,135 INFO L225 Difference]: With dead ends: 218 [2021-05-02 22:24:38,135 INFO L226 Difference]: Without dead ends: 215 [2021-05-02 22:24:38,136 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 624.2ms TimeCoverageRelationStatistics Valid=80, Invalid=1180, Unknown=0, NotChecked=0, Total=1260 [2021-05-02 22:24:38,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-05-02 22:24:38,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 215. [2021-05-02 22:24:38,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 159 states have (on average 1.0125786163522013) internal successors, (161), 159 states have internal predecessors, (161), 29 states have call successors, (29), 28 states have call predecessors, (29), 26 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2021-05-02 22:24:38,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 217 transitions. [2021-05-02 22:24:38,139 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 217 transitions. Word has length 210 [2021-05-02 22:24:38,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:24:38,139 INFO L480 AbstractCegarLoop]: Abstraction has 215 states and 217 transitions. [2021-05-02 22:24:38,140 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 32 states have (on average 2.71875) internal successors, (87), 31 states have internal predecessors, (87), 27 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2021-05-02 22:24:38,140 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 217 transitions. [2021-05-02 22:24:38,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2021-05-02 22:24:38,141 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:24:38,141 INFO L523 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:24:38,348 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-05-02 22:24:38,348 INFO L428 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:24:38,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:24:38,349 INFO L82 PathProgramCache]: Analyzing trace with hash -1235433444, now seen corresponding path program 25 times [2021-05-02 22:24:38,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:24:38,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523323192] [2021-05-02 22:24:38,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:24:38,354 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:24:38,354 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1156274525] [2021-05-02 22:24:38,354 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:24:38,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:24:38,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 630 conjuncts, 55 conjunts are in the unsatisfiable core [2021-05-02 22:24:38,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:24:38,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:38,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:38,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:38,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:38,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:38,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:38,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:38,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:38,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:38,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:38,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:38,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:38,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:38,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:38,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:38,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:38,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:38,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:38,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:38,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:38,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:38,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:38,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:38,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:38,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:38,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:38,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:38,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:38,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:38,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:38,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:38,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:38,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:38,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:38,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:38,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:38,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:38,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:38,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:38,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:38,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:38,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:38,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:38,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:38,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:38,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:38,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:38,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:38,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:38,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:38,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:38,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:38,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:38,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:38,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:38,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:38,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:38,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:38,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:38,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:38,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:38,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:38,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:38,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:38,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:38,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:38,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:38,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:38,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:38,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:38,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:38,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:38,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:38,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:38,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:39,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:39,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:39,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:39,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:39,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:39,068 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 50 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 22:24:39,068 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:24:39,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523323192] [2021-05-02 22:24:39,068 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:24:39,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156274525] [2021-05-02 22:24:39,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156274525] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:24:39,068 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:24:39,068 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2021-05-02 22:24:39,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108359696] [2021-05-02 22:24:39,069 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-02 22:24:39,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:24:39,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-02 22:24:39,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2021-05-02 22:24:39,070 INFO L87 Difference]: Start difference. First operand 215 states and 217 transitions. Second operand has 29 states, 29 states have (on average 5.448275862068965) internal successors, (158), 28 states have internal predecessors, (158), 28 states have call successors, (28), 28 states have call predecessors, (28), 26 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2021-05-02 22:24:39,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:24:39,690 INFO L93 Difference]: Finished difference Result 221 states and 222 transitions. [2021-05-02 22:24:39,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-05-02 22:24:39,691 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.448275862068965) internal successors, (158), 28 states have internal predecessors, (158), 28 states have call successors, (28), 28 states have call predecessors, (28), 26 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) Word has length 212 [2021-05-02 22:24:39,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:24:39,692 INFO L225 Difference]: With dead ends: 221 [2021-05-02 22:24:39,692 INFO L226 Difference]: Without dead ends: 221 [2021-05-02 22:24:39,693 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 669.8ms TimeCoverageRelationStatistics Valid=1080, Invalid=1782, Unknown=0, NotChecked=0, Total=2862 [2021-05-02 22:24:39,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-05-02 22:24:39,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 221. [2021-05-02 22:24:39,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 164 states have (on average 1.0121951219512195) internal successors, (166), 164 states have internal predecessors, (166), 29 states have call successors, (29), 29 states have call predecessors, (29), 27 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2021-05-02 22:24:39,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 222 transitions. [2021-05-02 22:24:39,696 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 222 transitions. Word has length 212 [2021-05-02 22:24:39,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:24:39,696 INFO L480 AbstractCegarLoop]: Abstraction has 221 states and 222 transitions. [2021-05-02 22:24:39,696 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 5.448275862068965) internal successors, (158), 28 states have internal predecessors, (158), 28 states have call successors, (28), 28 states have call predecessors, (28), 26 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2021-05-02 22:24:39,697 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 222 transitions. [2021-05-02 22:24:39,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2021-05-02 22:24:39,697 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:24:39,698 INFO L523 BasicCegarLoop]: trace histogram [27, 26, 26, 26, 26, 26, 26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:24:39,911 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-05-02 22:24:39,912 INFO L428 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:24:39,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:24:39,912 INFO L82 PathProgramCache]: Analyzing trace with hash -364917158, now seen corresponding path program 25 times [2021-05-02 22:24:39,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:24:39,912 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42255981] [2021-05-02 22:24:39,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:24:39,921 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:24:39,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1034227176] [2021-05-02 22:24:39,921 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:24:40,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:24:40,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 640 conjuncts, 116 conjunts are in the unsatisfiable core [2021-05-02 22:24:40,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:24:40,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:41,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:41,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:41,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:41,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:41,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:41,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:41,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:41,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:41,475 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 51 proven. 1376 refuted. 0 times theorem prover too weak. 1225 trivial. 0 not checked. [2021-05-02 22:24:41,476 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:24:41,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42255981] [2021-05-02 22:24:41,476 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:24:41,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034227176] [2021-05-02 22:24:41,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034227176] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:24:41,476 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:24:41,476 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2021-05-02 22:24:41,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852982256] [2021-05-02 22:24:41,477 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-02 22:24:41,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:24:41,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-02 22:24:41,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=992, Unknown=0, NotChecked=0, Total=1056 [2021-05-02 22:24:41,478 INFO L87 Difference]: Start difference. First operand 221 states and 222 transitions. Second operand has 33 states, 32 states have (on average 2.8125) internal successors, (90), 32 states have internal predecessors, (90), 28 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2021-05-02 22:24:42,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:24:42,433 INFO L93 Difference]: Finished difference Result 226 states and 228 transitions. [2021-05-02 22:24:42,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-02 22:24:42,433 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.8125) internal successors, (90), 32 states have internal predecessors, (90), 28 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) Word has length 218 [2021-05-02 22:24:42,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:24:42,434 INFO L225 Difference]: With dead ends: 226 [2021-05-02 22:24:42,434 INFO L226 Difference]: Without dead ends: 223 [2021-05-02 22:24:42,434 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 185 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 629.6ms TimeCoverageRelationStatistics Valid=79, Invalid=1181, Unknown=0, NotChecked=0, Total=1260 [2021-05-02 22:24:42,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-05-02 22:24:42,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 223. [2021-05-02 22:24:42,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 165 states have (on average 1.0121212121212122) internal successors, (167), 165 states have internal predecessors, (167), 30 states have call successors, (30), 29 states have call predecessors, (30), 27 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2021-05-02 22:24:42,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 225 transitions. [2021-05-02 22:24:42,438 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 225 transitions. Word has length 218 [2021-05-02 22:24:42,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:24:42,438 INFO L480 AbstractCegarLoop]: Abstraction has 223 states and 225 transitions. [2021-05-02 22:24:42,438 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 32 states have (on average 2.8125) internal successors, (90), 32 states have internal predecessors, (90), 28 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2021-05-02 22:24:42,438 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 225 transitions. [2021-05-02 22:24:42,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2021-05-02 22:24:42,439 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:24:42,439 INFO L523 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:24:42,645 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:24:42,646 INFO L428 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:24:42,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:24:42,646 INFO L82 PathProgramCache]: Analyzing trace with hash -1937147715, now seen corresponding path program 26 times [2021-05-02 22:24:42,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:24:42,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763348829] [2021-05-02 22:24:42,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:24:42,650 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:24:42,650 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1234912956] [2021-05-02 22:24:42,650 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:24:42,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 22:24:42,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:24:42,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 651 conjuncts, 57 conjunts are in the unsatisfiable core [2021-05-02 22:24:42,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:24:42,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:42,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:42,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:42,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:42,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:42,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:42,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:42,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:42,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:42,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:42,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:42,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:42,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:42,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:42,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:42,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:42,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:42,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:42,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:42,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:42,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:42,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:42,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:42,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:42,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:42,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:42,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:42,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:42,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:42,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:42,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:42,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:42,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:42,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:42,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:42,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:42,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:42,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:42,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:42,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:42,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:42,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:43,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:43,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:43,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:43,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:43,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:43,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:43,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:43,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:43,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:43,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:43,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:43,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:43,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:43,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:43,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:43,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:43,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:43,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:43,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:43,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:43,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:43,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:43,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:43,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:43,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:43,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:43,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:43,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:43,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:43,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:43,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:43,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:43,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:43,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:43,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:43,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:43,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:43,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:43,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:43,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:43,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:43,426 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 52 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 22:24:43,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:24:43,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763348829] [2021-05-02 22:24:43,426 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:24:43,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234912956] [2021-05-02 22:24:43,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234912956] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:24:43,426 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:24:43,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2021-05-02 22:24:43,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503413412] [2021-05-02 22:24:43,427 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-02 22:24:43,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:24:43,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-02 22:24:43,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2021-05-02 22:24:43,428 INFO L87 Difference]: Start difference. First operand 223 states and 225 transitions. Second operand has 30 states, 30 states have (on average 5.466666666666667) internal successors, (164), 29 states have internal predecessors, (164), 29 states have call successors, (29), 29 states have call predecessors, (29), 27 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2021-05-02 22:24:44,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:24:44,037 INFO L93 Difference]: Finished difference Result 229 states and 230 transitions. [2021-05-02 22:24:44,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-05-02 22:24:44,038 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 5.466666666666667) internal successors, (164), 29 states have internal predecessors, (164), 29 states have call successors, (29), 29 states have call predecessors, (29), 27 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) Word has length 220 [2021-05-02 22:24:44,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:24:44,038 INFO L225 Difference]: With dead ends: 229 [2021-05-02 22:24:44,038 INFO L226 Difference]: Without dead ends: 229 [2021-05-02 22:24:44,039 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 744.3ms TimeCoverageRelationStatistics Valid=1162, Invalid=1918, Unknown=0, NotChecked=0, Total=3080 [2021-05-02 22:24:44,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-05-02 22:24:44,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 229. [2021-05-02 22:24:44,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 170 states have (on average 1.011764705882353) internal successors, (172), 170 states have internal predecessors, (172), 30 states have call successors, (30), 30 states have call predecessors, (30), 28 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2021-05-02 22:24:44,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 230 transitions. [2021-05-02 22:24:44,042 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 230 transitions. Word has length 220 [2021-05-02 22:24:44,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:24:44,042 INFO L480 AbstractCegarLoop]: Abstraction has 229 states and 230 transitions. [2021-05-02 22:24:44,042 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 5.466666666666667) internal successors, (164), 29 states have internal predecessors, (164), 29 states have call successors, (29), 29 states have call predecessors, (29), 27 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2021-05-02 22:24:44,042 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 230 transitions. [2021-05-02 22:24:44,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2021-05-02 22:24:44,043 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:24:44,043 INFO L523 BasicCegarLoop]: trace histogram [28, 27, 27, 27, 27, 27, 27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:24:44,265 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:24:44,265 INFO L428 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:24:44,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:24:44,266 INFO L82 PathProgramCache]: Analyzing trace with hash -51133893, now seen corresponding path program 26 times [2021-05-02 22:24:44,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:24:44,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133276166] [2021-05-02 22:24:44,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:24:44,270 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:24:44,270 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [618439287] [2021-05-02 22:24:44,270 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:24:45,026 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 22:24:45,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:24:45,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 661 conjuncts, 120 conjunts are in the unsatisfiable core [2021-05-02 22:24:45,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:24:45,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:45,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:45,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:45,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:45,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:45,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:45,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:45,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:45,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:45,871 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 53 proven. 1483 refuted. 0 times theorem prover too weak. 1326 trivial. 0 not checked. [2021-05-02 22:24:45,872 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:24:45,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133276166] [2021-05-02 22:24:45,872 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:24:45,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618439287] [2021-05-02 22:24:45,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618439287] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:24:45,872 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:24:45,872 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2021-05-02 22:24:45,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334693513] [2021-05-02 22:24:45,872 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-02 22:24:45,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:24:45,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-02 22:24:45,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=1056, Unknown=0, NotChecked=0, Total=1122 [2021-05-02 22:24:45,873 INFO L87 Difference]: Start difference. First operand 229 states and 230 transitions. Second operand has 34 states, 33 states have (on average 2.8181818181818183) internal successors, (93), 33 states have internal predecessors, (93), 29 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2021-05-02 22:24:46,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:24:46,827 INFO L93 Difference]: Finished difference Result 234 states and 236 transitions. [2021-05-02 22:24:46,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-02 22:24:46,828 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.8181818181818183) internal successors, (93), 33 states have internal predecessors, (93), 29 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) Word has length 226 [2021-05-02 22:24:46,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:24:46,829 INFO L225 Difference]: With dead ends: 234 [2021-05-02 22:24:46,829 INFO L226 Difference]: Without dead ends: 231 [2021-05-02 22:24:46,829 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 192 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 598.4ms TimeCoverageRelationStatistics Valid=81, Invalid=1251, Unknown=0, NotChecked=0, Total=1332 [2021-05-02 22:24:46,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-05-02 22:24:46,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 231. [2021-05-02 22:24:46,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 171 states have (on average 1.0116959064327486) internal successors, (173), 171 states have internal predecessors, (173), 31 states have call successors, (31), 30 states have call predecessors, (31), 28 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2021-05-02 22:24:46,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 233 transitions. [2021-05-02 22:24:46,833 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 233 transitions. Word has length 226 [2021-05-02 22:24:46,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:24:46,834 INFO L480 AbstractCegarLoop]: Abstraction has 231 states and 233 transitions. [2021-05-02 22:24:46,834 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 2.8181818181818183) internal successors, (93), 33 states have internal predecessors, (93), 29 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2021-05-02 22:24:46,834 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 233 transitions. [2021-05-02 22:24:46,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2021-05-02 22:24:46,835 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:24:46,835 INFO L523 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:24:47,040 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:24:47,041 INFO L428 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:24:47,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:24:47,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1039140770, now seen corresponding path program 27 times [2021-05-02 22:24:47,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:24:47,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469243393] [2021-05-02 22:24:47,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:24:47,045 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:24:47,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1398907377] [2021-05-02 22:24:47,045 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:24:48,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2021-05-02 22:24:48,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:24:48,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 672 conjuncts, 59 conjunts are in the unsatisfiable core [2021-05-02 22:24:48,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:24:48,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:48,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:48,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:48,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:48,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:48,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:48,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:48,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:48,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:48,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:48,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:48,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:48,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:48,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:48,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:48,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:48,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:48,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:48,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:48,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:48,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:48,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:48,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:48,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:48,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:48,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:48,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:48,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:48,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:48,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:48,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:48,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:48,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:48,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:48,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:48,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:48,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:48,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:48,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:48,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:48,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:48,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:48,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:48,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:48,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:48,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:48,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:48,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:48,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:48,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:48,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:48,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:48,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:48,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:48,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:48,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:48,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:48,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:48,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:48,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:48,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:48,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:48,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:48,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:48,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:48,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:48,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:48,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:48,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:48,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:48,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:48,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:48,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:48,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:48,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:49,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:49,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:49,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:49,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:49,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:49,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:49,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:49,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:49,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:49,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:49,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:49,131 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 54 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 22:24:49,132 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:24:49,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469243393] [2021-05-02 22:24:49,132 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:24:49,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398907377] [2021-05-02 22:24:49,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398907377] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:24:49,132 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:24:49,132 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2021-05-02 22:24:49,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217904541] [2021-05-02 22:24:49,133 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-02 22:24:49,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:24:49,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-02 22:24:49,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2021-05-02 22:24:49,133 INFO L87 Difference]: Start difference. First operand 231 states and 233 transitions. Second operand has 31 states, 31 states have (on average 5.483870967741935) internal successors, (170), 30 states have internal predecessors, (170), 30 states have call successors, (30), 30 states have call predecessors, (30), 28 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2021-05-02 22:24:49,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:24:49,750 INFO L93 Difference]: Finished difference Result 237 states and 238 transitions. [2021-05-02 22:24:49,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-05-02 22:24:49,751 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 5.483870967741935) internal successors, (170), 30 states have internal predecessors, (170), 30 states have call successors, (30), 30 states have call predecessors, (30), 28 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) Word has length 228 [2021-05-02 22:24:49,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:24:49,752 INFO L225 Difference]: With dead ends: 237 [2021-05-02 22:24:49,752 INFO L226 Difference]: Without dead ends: 237 [2021-05-02 22:24:49,752 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 788.1ms TimeCoverageRelationStatistics Valid=1247, Invalid=2059, Unknown=0, NotChecked=0, Total=3306 [2021-05-02 22:24:49,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-05-02 22:24:49,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 237. [2021-05-02 22:24:49,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 176 states have (on average 1.0113636363636365) internal successors, (178), 176 states have internal predecessors, (178), 31 states have call successors, (31), 31 states have call predecessors, (31), 29 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2021-05-02 22:24:49,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 238 transitions. [2021-05-02 22:24:49,755 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 238 transitions. Word has length 228 [2021-05-02 22:24:49,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:24:49,755 INFO L480 AbstractCegarLoop]: Abstraction has 237 states and 238 transitions. [2021-05-02 22:24:49,756 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 5.483870967741935) internal successors, (170), 30 states have internal predecessors, (170), 30 states have call successors, (30), 30 states have call predecessors, (30), 28 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2021-05-02 22:24:49,756 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 238 transitions. [2021-05-02 22:24:49,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2021-05-02 22:24:49,757 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:24:49,757 INFO L523 BasicCegarLoop]: trace histogram [29, 28, 28, 28, 28, 28, 28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:24:49,963 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2021-05-02 22:24:49,963 INFO L428 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:24:49,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:24:49,964 INFO L82 PathProgramCache]: Analyzing trace with hash -232110820, now seen corresponding path program 27 times [2021-05-02 22:24:49,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:24:49,964 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616711946] [2021-05-02 22:24:49,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:24:49,969 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:24:49,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1649158586] [2021-05-02 22:24:49,969 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:24:51,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2021-05-02 22:24:51,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:24:51,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 682 conjuncts, 131 conjunts are in the unsatisfiable core [2021-05-02 22:24:51,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:24:51,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:51,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:51,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:51,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:51,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:51,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:51,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:51,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:51,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:51,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:51,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:51,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:51,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:51,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:51,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:51,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:51,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:51,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:51,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:51,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:51,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:51,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:51,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:51,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:51,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:51,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:51,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:51,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:51,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:51,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:51,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:51,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:51,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:51,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:51,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:51,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:51,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:51,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:52,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:52,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:52,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:52,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:52,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:52,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:52,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:52,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:52,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:52,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:52,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:52,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:52,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:52,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:52,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:52,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:52,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:52,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:52,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:52,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:52,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:52,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:52,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:52,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:52,445 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 58 proven. 1591 refuted. 0 times theorem prover too weak. 1431 trivial. 0 not checked. [2021-05-02 22:24:52,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:24:52,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616711946] [2021-05-02 22:24:52,446 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:24:52,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649158586] [2021-05-02 22:24:52,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649158586] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:24:52,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:24:52,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2021-05-02 22:24:52,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980522029] [2021-05-02 22:24:52,446 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-02 22:24:52,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:24:52,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-02 22:24:52,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=1189, Unknown=0, NotChecked=0, Total=1260 [2021-05-02 22:24:52,447 INFO L87 Difference]: Start difference. First operand 237 states and 238 transitions. Second operand has 36 states, 35 states have (on average 2.742857142857143) internal successors, (96), 34 states have internal predecessors, (96), 30 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2021-05-02 22:24:55,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:24:55,846 INFO L93 Difference]: Finished difference Result 242 states and 244 transitions. [2021-05-02 22:24:55,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-02 22:24:55,846 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.742857142857143) internal successors, (96), 34 states have internal predecessors, (96), 30 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) Word has length 234 [2021-05-02 22:24:55,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:24:55,847 INFO L225 Difference]: With dead ends: 242 [2021-05-02 22:24:55,847 INFO L226 Difference]: Without dead ends: 239 [2021-05-02 22:24:55,847 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 730.0ms TimeCoverageRelationStatistics Valid=86, Invalid=1396, Unknown=0, NotChecked=0, Total=1482 [2021-05-02 22:24:55,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-05-02 22:24:55,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 239. [2021-05-02 22:24:55,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 177 states have (on average 1.0112994350282485) internal successors, (179), 177 states have internal predecessors, (179), 32 states have call successors, (32), 31 states have call predecessors, (32), 29 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2021-05-02 22:24:55,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 241 transitions. [2021-05-02 22:24:55,851 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 241 transitions. Word has length 234 [2021-05-02 22:24:55,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:24:55,851 INFO L480 AbstractCegarLoop]: Abstraction has 239 states and 241 transitions. [2021-05-02 22:24:55,851 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 35 states have (on average 2.742857142857143) internal successors, (96), 34 states have internal predecessors, (96), 30 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2021-05-02 22:24:55,851 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 241 transitions. [2021-05-02 22:24:55,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2021-05-02 22:24:55,852 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:24:55,853 INFO L523 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:24:56,060 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:24:56,061 INFO L428 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:24:56,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:24:56,061 INFO L82 PathProgramCache]: Analyzing trace with hash 1135691519, now seen corresponding path program 28 times [2021-05-02 22:24:56,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:24:56,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661553563] [2021-05-02 22:24:56,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:24:56,066 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:24:56,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1925527784] [2021-05-02 22:24:56,066 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:24:58,120 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 22:24:58,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:24:58,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 693 conjuncts, 61 conjunts are in the unsatisfiable core [2021-05-02 22:24:58,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:24:58,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:58,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:58,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:58,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:58,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:58,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:58,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:58,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:58,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:58,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:58,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:58,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:58,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:58,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:58,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:58,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:58,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:58,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:58,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:58,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:58,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:58,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:58,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:58,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:58,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:58,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:58,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:58,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:58,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:58,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:58,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:58,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:58,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:58,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:58,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:58,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:58,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:58,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:58,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:58,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:58,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:58,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:58,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:58,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:58,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:58,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:58,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:58,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:58,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:58,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:58,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:58,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:58,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:58,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:58,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:58,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:58,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:58,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:58,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:58,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:58,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:58,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:58,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:58,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:58,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:58,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:58,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:58,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:58,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:58,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:58,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:58,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:58,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:58,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:58,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:58,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:58,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:58,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:58,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:58,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:58,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:58,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:58,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:58,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:58,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:58,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:58,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:58,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:58,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:24:58,853 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 56 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 22:24:58,854 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:24:58,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661553563] [2021-05-02 22:24:58,854 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:24:58,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925527784] [2021-05-02 22:24:58,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925527784] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:24:58,854 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:24:58,854 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2021-05-02 22:24:58,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861796801] [2021-05-02 22:24:58,854 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-02 22:24:58,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:24:58,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-02 22:24:58,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2021-05-02 22:24:58,855 INFO L87 Difference]: Start difference. First operand 239 states and 241 transitions. Second operand has 32 states, 32 states have (on average 5.5) internal successors, (176), 31 states have internal predecessors, (176), 31 states have call successors, (31), 31 states have call predecessors, (31), 29 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2021-05-02 22:24:59,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:24:59,506 INFO L93 Difference]: Finished difference Result 245 states and 246 transitions. [2021-05-02 22:24:59,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-05-02 22:24:59,507 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.5) internal successors, (176), 31 states have internal predecessors, (176), 31 states have call successors, (31), 31 states have call predecessors, (31), 29 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) Word has length 236 [2021-05-02 22:24:59,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:24:59,508 INFO L225 Difference]: With dead ends: 245 [2021-05-02 22:24:59,508 INFO L226 Difference]: Without dead ends: 245 [2021-05-02 22:24:59,508 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 819.9ms TimeCoverageRelationStatistics Valid=1335, Invalid=2205, Unknown=0, NotChecked=0, Total=3540 [2021-05-02 22:24:59,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-05-02 22:24:59,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 245. [2021-05-02 22:24:59,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 182 states have (on average 1.010989010989011) internal successors, (184), 182 states have internal predecessors, (184), 32 states have call successors, (32), 32 states have call predecessors, (32), 30 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2021-05-02 22:24:59,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 246 transitions. [2021-05-02 22:24:59,510 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 246 transitions. Word has length 236 [2021-05-02 22:24:59,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:24:59,511 INFO L480 AbstractCegarLoop]: Abstraction has 245 states and 246 transitions. [2021-05-02 22:24:59,511 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 5.5) internal successors, (176), 31 states have internal predecessors, (176), 31 states have call successors, (31), 31 states have call predecessors, (31), 29 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2021-05-02 22:24:59,511 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 246 transitions. [2021-05-02 22:24:59,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2021-05-02 22:24:59,512 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:24:59,512 INFO L523 BasicCegarLoop]: trace histogram [30, 29, 29, 29, 29, 29, 29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:24:59,720 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-05-02 22:24:59,720 INFO L428 AbstractCegarLoop]: === Iteration 62 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:24:59,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:24:59,721 INFO L82 PathProgramCache]: Analyzing trace with hash 1642354429, now seen corresponding path program 28 times [2021-05-02 22:24:59,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:24:59,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928593916] [2021-05-02 22:24:59,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:24:59,725 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:24:59,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1878153713] [2021-05-02 22:24:59,726 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:25:02,626 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 22:25:02,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:25:02,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 703 conjuncts, 129 conjunts are in the unsatisfiable core [2021-05-02 22:25:02,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:25:02,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:02,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:02,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:02,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:02,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:02,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:02,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:02,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:02,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:02,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:02,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:02,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:02,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:02,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:02,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:02,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:02,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:02,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:02,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:02,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:02,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:02,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:02,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:03,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:03,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:03,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:03,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:03,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:03,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:03,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:03,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:03,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:03,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:03,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:03,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:03,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:03,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:03,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:03,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:03,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:03,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:03,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:03,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:03,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:03,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:03,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:03,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:03,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:03,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:03,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:03,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:03,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:03,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:03,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:03,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:03,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:03,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:03,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:03,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:03,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:03,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:03,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:03,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:03,844 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 57 proven. 1709 refuted. 0 times theorem prover too weak. 1540 trivial. 0 not checked. [2021-05-02 22:25:03,845 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:25:03,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928593916] [2021-05-02 22:25:03,845 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:25:03,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878153713] [2021-05-02 22:25:03,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878153713] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:25:03,845 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:25:03,845 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2021-05-02 22:25:03,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596896354] [2021-05-02 22:25:03,845 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-02 22:25:03,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:25:03,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-02 22:25:03,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=1190, Unknown=0, NotChecked=0, Total=1260 [2021-05-02 22:25:03,846 INFO L87 Difference]: Start difference. First operand 245 states and 246 transitions. Second operand has 36 states, 35 states have (on average 2.8285714285714287) internal successors, (99), 35 states have internal predecessors, (99), 31 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2021-05-02 22:25:04,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:25:04,992 INFO L93 Difference]: Finished difference Result 250 states and 252 transitions. [2021-05-02 22:25:04,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-02 22:25:04,993 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.8285714285714287) internal successors, (99), 35 states have internal predecessors, (99), 31 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) Word has length 242 [2021-05-02 22:25:04,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:25:04,994 INFO L225 Difference]: With dead ends: 250 [2021-05-02 22:25:04,994 INFO L226 Difference]: Without dead ends: 247 [2021-05-02 22:25:04,994 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 206 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 831.9ms TimeCoverageRelationStatistics Valid=85, Invalid=1397, Unknown=0, NotChecked=0, Total=1482 [2021-05-02 22:25:04,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-05-02 22:25:04,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 247. [2021-05-02 22:25:04,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 183 states have (on average 1.010928961748634) internal successors, (185), 183 states have internal predecessors, (185), 33 states have call successors, (33), 32 states have call predecessors, (33), 30 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2021-05-02 22:25:04,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 249 transitions. [2021-05-02 22:25:04,998 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 249 transitions. Word has length 242 [2021-05-02 22:25:04,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:25:04,998 INFO L480 AbstractCegarLoop]: Abstraction has 247 states and 249 transitions. [2021-05-02 22:25:04,998 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 35 states have (on average 2.8285714285714287) internal successors, (99), 35 states have internal predecessors, (99), 31 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2021-05-02 22:25:04,998 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 249 transitions. [2021-05-02 22:25:04,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2021-05-02 22:25:04,999 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:25:04,999 INFO L523 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:25:05,210 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:25:05,210 INFO L428 AbstractCegarLoop]: === Iteration 63 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:25:05,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:25:05,210 INFO L82 PathProgramCache]: Analyzing trace with hash -1389468512, now seen corresponding path program 29 times [2021-05-02 22:25:05,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:25:05,211 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679745214] [2021-05-02 22:25:05,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:25:05,216 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:25:05,216 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1482950164] [2021-05-02 22:25:05,216 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:25:06,094 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2021-05-02 22:25:06,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:25:06,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 714 conjuncts, 63 conjunts are in the unsatisfiable core [2021-05-02 22:25:06,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:25:06,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:06,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:06,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:06,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:06,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:06,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:06,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:06,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:06,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:06,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:06,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:06,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:06,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:06,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:06,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:06,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:06,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:06,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:06,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:06,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:06,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:06,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:06,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:06,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:06,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:06,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:06,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:06,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:06,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:06,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:06,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:06,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:06,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:06,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:06,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:06,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:06,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:06,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:06,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:06,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:06,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:06,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:06,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:06,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:06,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:06,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:06,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:06,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:06,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:06,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:06,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:06,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:06,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:06,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:06,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:06,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:06,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:06,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:06,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:06,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:06,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:06,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:06,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:06,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:06,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:06,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:06,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:06,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:06,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:06,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:06,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:06,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:06,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:06,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:06,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:06,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:06,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:06,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:06,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:06,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:06,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:06,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:06,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:06,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:06,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:06,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:06,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:06,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:06,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:06,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:06,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:06,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:06,894 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 58 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 22:25:06,894 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:25:06,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679745214] [2021-05-02 22:25:06,894 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:25:06,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482950164] [2021-05-02 22:25:06,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482950164] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:25:06,894 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:25:06,894 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2021-05-02 22:25:06,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770191910] [2021-05-02 22:25:06,895 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-02 22:25:06,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:25:06,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-02 22:25:06,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2021-05-02 22:25:06,895 INFO L87 Difference]: Start difference. First operand 247 states and 249 transitions. Second operand has 33 states, 33 states have (on average 5.515151515151516) internal successors, (182), 32 states have internal predecessors, (182), 32 states have call successors, (32), 32 states have call predecessors, (32), 30 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2021-05-02 22:25:07,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:25:07,869 INFO L93 Difference]: Finished difference Result 253 states and 254 transitions. [2021-05-02 22:25:07,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-05-02 22:25:07,869 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.515151515151516) internal successors, (182), 32 states have internal predecessors, (182), 32 states have call successors, (32), 32 states have call predecessors, (32), 30 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) Word has length 244 [2021-05-02 22:25:07,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:25:07,870 INFO L225 Difference]: With dead ends: 253 [2021-05-02 22:25:07,870 INFO L226 Difference]: Without dead ends: 253 [2021-05-02 22:25:07,870 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 916.8ms TimeCoverageRelationStatistics Valid=1426, Invalid=2356, Unknown=0, NotChecked=0, Total=3782 [2021-05-02 22:25:07,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-05-02 22:25:07,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 253. [2021-05-02 22:25:07,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 188 states have (on average 1.0106382978723405) internal successors, (190), 188 states have internal predecessors, (190), 33 states have call successors, (33), 33 states have call predecessors, (33), 31 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2021-05-02 22:25:07,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 254 transitions. [2021-05-02 22:25:07,874 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 254 transitions. Word has length 244 [2021-05-02 22:25:07,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:25:07,874 INFO L480 AbstractCegarLoop]: Abstraction has 253 states and 254 transitions. [2021-05-02 22:25:07,874 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 5.515151515151516) internal successors, (182), 32 states have internal predecessors, (182), 32 states have call successors, (32), 32 states have call predecessors, (32), 30 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2021-05-02 22:25:07,874 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 254 transitions. [2021-05-02 22:25:07,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2021-05-02 22:25:07,875 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:25:07,876 INFO L523 BasicCegarLoop]: trace histogram [31, 30, 30, 30, 30, 30, 30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:25:08,076 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:25:08,076 INFO L428 AbstractCegarLoop]: === Iteration 64 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:25:08,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:25:08,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1394800606, now seen corresponding path program 29 times [2021-05-02 22:25:08,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:25:08,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125743327] [2021-05-02 22:25:08,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:25:08,081 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:25:08,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1917937057] [2021-05-02 22:25:08,081 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:25:09,328 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2021-05-02 22:25:09,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:25:09,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 724 conjuncts, 132 conjunts are in the unsatisfiable core [2021-05-02 22:25:09,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:25:09,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:10,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:10,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:10,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:10,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:10,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:10,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:10,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:10,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:10,373 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 71 proven. 1816 refuted. 0 times theorem prover too weak. 1653 trivial. 0 not checked. [2021-05-02 22:25:10,373 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:25:10,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125743327] [2021-05-02 22:25:10,373 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:25:10,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917937057] [2021-05-02 22:25:10,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917937057] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:25:10,374 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:25:10,374 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2021-05-02 22:25:10,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024652425] [2021-05-02 22:25:10,374 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-02 22:25:10,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:25:10,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-02 22:25:10,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=1260, Unknown=0, NotChecked=0, Total=1332 [2021-05-02 22:25:10,375 INFO L87 Difference]: Start difference. First operand 253 states and 254 transitions. Second operand has 37 states, 36 states have (on average 2.8333333333333335) internal successors, (102), 36 states have internal predecessors, (102), 32 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2021-05-02 22:25:11,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:25:11,579 INFO L93 Difference]: Finished difference Result 258 states and 260 transitions. [2021-05-02 22:25:11,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-02 22:25:11,580 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.8333333333333335) internal successors, (102), 36 states have internal predecessors, (102), 32 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) Word has length 250 [2021-05-02 22:25:11,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:25:11,581 INFO L225 Difference]: With dead ends: 258 [2021-05-02 22:25:11,581 INFO L226 Difference]: Without dead ends: 255 [2021-05-02 22:25:11,581 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 213 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 753.3ms TimeCoverageRelationStatistics Valid=87, Invalid=1473, Unknown=0, NotChecked=0, Total=1560 [2021-05-02 22:25:11,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-05-02 22:25:11,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 255. [2021-05-02 22:25:11,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 189 states have (on average 1.0105820105820107) internal successors, (191), 189 states have internal predecessors, (191), 34 states have call successors, (34), 33 states have call predecessors, (34), 31 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2021-05-02 22:25:11,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 257 transitions. [2021-05-02 22:25:11,584 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 257 transitions. Word has length 250 [2021-05-02 22:25:11,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:25:11,584 INFO L480 AbstractCegarLoop]: Abstraction has 255 states and 257 transitions. [2021-05-02 22:25:11,585 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 36 states have (on average 2.8333333333333335) internal successors, (102), 36 states have internal predecessors, (102), 32 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2021-05-02 22:25:11,585 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 257 transitions. [2021-05-02 22:25:11,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2021-05-02 22:25:11,586 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:25:11,586 INFO L523 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:25:11,793 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:25:11,793 INFO L428 AbstractCegarLoop]: === Iteration 65 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:25:11,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:25:11,794 INFO L82 PathProgramCache]: Analyzing trace with hash 1229476161, now seen corresponding path program 30 times [2021-05-02 22:25:11,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:25:11,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347464570] [2021-05-02 22:25:11,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:25:11,803 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:25:11,804 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [786263235] [2021-05-02 22:25:11,804 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:25:13,971 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2021-05-02 22:25:13,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:25:13,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 735 conjuncts, 65 conjunts are in the unsatisfiable core [2021-05-02 22:25:13,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:25:13,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:13,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:13,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:13,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:13,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:13,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:14,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:14,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:14,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:14,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:14,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:14,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:14,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:14,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:14,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:14,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:14,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:14,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:14,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:14,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:14,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:14,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:14,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:14,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:14,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:14,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:14,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:14,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:14,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:14,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:14,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:14,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:14,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:14,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:14,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:14,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:14,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:14,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:14,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:14,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:14,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:14,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:14,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:14,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:14,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:14,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:14,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:14,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:14,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:14,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:14,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:14,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:14,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:14,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:14,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:14,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:14,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:14,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:14,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:14,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:14,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:14,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:14,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:14,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:14,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:14,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:14,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:14,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:14,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:14,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:14,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:14,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:14,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:14,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:14,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:14,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:14,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:14,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:14,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:14,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:14,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:14,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:14,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:14,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:14,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:14,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:14,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:14,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:14,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:14,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:14,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:14,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:14,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:14,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:14,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:14,818 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 60 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 22:25:14,818 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:25:14,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347464570] [2021-05-02 22:25:14,818 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:25:14,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786263235] [2021-05-02 22:25:14,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786263235] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:25:14,819 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:25:14,819 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2021-05-02 22:25:14,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891402389] [2021-05-02 22:25:14,819 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-02 22:25:14,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:25:14,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-02 22:25:14,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2021-05-02 22:25:14,820 INFO L87 Difference]: Start difference. First operand 255 states and 257 transitions. Second operand has 34 states, 34 states have (on average 5.529411764705882) internal successors, (188), 33 states have internal predecessors, (188), 33 states have call successors, (33), 33 states have call predecessors, (33), 31 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2021-05-02 22:25:15,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:25:15,616 INFO L93 Difference]: Finished difference Result 261 states and 262 transitions. [2021-05-02 22:25:15,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-05-02 22:25:15,616 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.529411764705882) internal successors, (188), 33 states have internal predecessors, (188), 33 states have call successors, (33), 33 states have call predecessors, (33), 31 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) Word has length 252 [2021-05-02 22:25:15,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:25:15,617 INFO L225 Difference]: With dead ends: 261 [2021-05-02 22:25:15,617 INFO L226 Difference]: Without dead ends: 261 [2021-05-02 22:25:15,618 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 982.7ms TimeCoverageRelationStatistics Valid=1520, Invalid=2512, Unknown=0, NotChecked=0, Total=4032 [2021-05-02 22:25:15,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-05-02 22:25:15,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 261. [2021-05-02 22:25:15,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 194 states have (on average 1.0103092783505154) internal successors, (196), 194 states have internal predecessors, (196), 34 states have call successors, (34), 34 states have call predecessors, (34), 32 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2021-05-02 22:25:15,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 262 transitions. [2021-05-02 22:25:15,622 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 262 transitions. Word has length 252 [2021-05-02 22:25:15,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:25:15,622 INFO L480 AbstractCegarLoop]: Abstraction has 261 states and 262 transitions. [2021-05-02 22:25:15,622 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 5.529411764705882) internal successors, (188), 33 states have internal predecessors, (188), 33 states have call successors, (33), 33 states have call predecessors, (33), 31 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2021-05-02 22:25:15,622 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 262 transitions. [2021-05-02 22:25:15,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2021-05-02 22:25:15,623 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:25:15,623 INFO L523 BasicCegarLoop]: trace histogram [32, 31, 31, 31, 31, 31, 31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:25:15,831 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:25:15,831 INFO L428 AbstractCegarLoop]: === Iteration 66 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:25:15,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:25:15,832 INFO L82 PathProgramCache]: Analyzing trace with hash 1005004735, now seen corresponding path program 30 times [2021-05-02 22:25:15,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:25:15,832 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820154988] [2021-05-02 22:25:15,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:25:15,836 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:25:15,836 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1204674599] [2021-05-02 22:25:15,836 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:25:42,406 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2021-05-02 22:25:42,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:25:42,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 745 conjuncts, 151 conjunts are in the unsatisfiable core [2021-05-02 22:25:42,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:25:43,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:43,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:43,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:43,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:43,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:43,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:43,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:43,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:43,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:43,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:43,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:43,699 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 230 proven. 1944 refuted. 0 times theorem prover too weak. 1608 trivial. 0 not checked. [2021-05-02 22:25:43,699 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:25:43,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820154988] [2021-05-02 22:25:43,699 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:25:43,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204674599] [2021-05-02 22:25:43,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204674599] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:25:43,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:25:43,699 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2021-05-02 22:25:43,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415031761] [2021-05-02 22:25:43,700 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-05-02 22:25:43,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:25:43,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-05-02 22:25:43,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1557, Unknown=0, NotChecked=0, Total=1640 [2021-05-02 22:25:43,700 INFO L87 Difference]: Start difference. First operand 261 states and 262 transitions. Second operand has 41 states, 40 states have (on average 2.625) internal successors, (105), 37 states have internal predecessors, (105), 33 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2021-05-02 22:25:48,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:25:48,329 INFO L93 Difference]: Finished difference Result 266 states and 268 transitions. [2021-05-02 22:25:48,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-02 22:25:48,329 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 2.625) internal successors, (105), 37 states have internal predecessors, (105), 33 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) Word has length 258 [2021-05-02 22:25:48,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:25:48,330 INFO L225 Difference]: With dead ends: 266 [2021-05-02 22:25:48,330 INFO L226 Difference]: Without dead ends: 263 [2021-05-02 22:25:48,331 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 945.4ms TimeCoverageRelationStatistics Valid=99, Invalid=1793, Unknown=0, NotChecked=0, Total=1892 [2021-05-02 22:25:48,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2021-05-02 22:25:48,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 263. [2021-05-02 22:25:48,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 195 states have (on average 1.0102564102564102) internal successors, (197), 195 states have internal predecessors, (197), 35 states have call successors, (35), 34 states have call predecessors, (35), 32 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2021-05-02 22:25:48,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 265 transitions. [2021-05-02 22:25:48,334 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 265 transitions. Word has length 258 [2021-05-02 22:25:48,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:25:48,335 INFO L480 AbstractCegarLoop]: Abstraction has 263 states and 265 transitions. [2021-05-02 22:25:48,335 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 41 states, 40 states have (on average 2.625) internal successors, (105), 37 states have internal predecessors, (105), 33 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2021-05-02 22:25:48,335 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 265 transitions. [2021-05-02 22:25:48,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2021-05-02 22:25:48,336 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:25:48,336 INFO L523 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:25:48,561 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable94 [2021-05-02 22:25:48,562 INFO L428 AbstractCegarLoop]: === Iteration 67 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:25:48,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:25:48,562 INFO L82 PathProgramCache]: Analyzing trace with hash 297798882, now seen corresponding path program 31 times [2021-05-02 22:25:48,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:25:48,562 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597637332] [2021-05-02 22:25:48,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:25:48,566 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:25:48,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [761585306] [2021-05-02 22:25:48,566 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:25:48,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:25:48,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 756 conjuncts, 67 conjunts are in the unsatisfiable core [2021-05-02 22:25:48,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:25:48,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:48,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:48,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:48,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:48,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:48,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:48,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:48,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:48,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:48,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:48,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:48,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:48,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:48,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:48,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:48,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:48,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:48,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:48,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:48,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:48,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:48,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:48,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:48,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:48,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:48,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:48,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:48,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:48,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:48,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:48,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:48,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:48,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:48,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:48,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:48,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:48,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:48,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:48,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:48,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:48,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:48,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:48,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:48,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:48,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:48,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:48,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:48,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:49,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:49,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:49,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:49,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:49,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:49,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:49,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:49,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:49,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:49,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:49,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:49,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:49,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:49,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:49,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:49,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:49,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:49,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:49,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:49,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:49,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:49,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:49,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:49,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:49,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:49,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:49,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:49,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:49,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:49,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:49,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:49,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:49,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:49,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:49,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:49,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:49,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:49,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:49,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:49,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:49,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:49,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:49,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:49,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:49,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:49,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:49,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:49,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:49,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:49,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:49,558 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 62 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 22:25:49,559 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:25:49,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597637332] [2021-05-02 22:25:49,559 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:25:49,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761585306] [2021-05-02 22:25:49,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761585306] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:25:49,559 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:25:49,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2021-05-02 22:25:49,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595467206] [2021-05-02 22:25:49,559 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-02 22:25:49,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:25:49,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-02 22:25:49,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2021-05-02 22:25:49,560 INFO L87 Difference]: Start difference. First operand 263 states and 265 transitions. Second operand has 35 states, 35 states have (on average 5.542857142857143) internal successors, (194), 34 states have internal predecessors, (194), 34 states have call successors, (34), 34 states have call predecessors, (34), 32 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2021-05-02 22:25:50,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:25:50,386 INFO L93 Difference]: Finished difference Result 269 states and 270 transitions. [2021-05-02 22:25:50,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-05-02 22:25:50,386 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 5.542857142857143) internal successors, (194), 34 states have internal predecessors, (194), 34 states have call successors, (34), 34 states have call predecessors, (34), 32 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) Word has length 260 [2021-05-02 22:25:50,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:25:50,387 INFO L225 Difference]: With dead ends: 269 [2021-05-02 22:25:50,387 INFO L226 Difference]: Without dead ends: 269 [2021-05-02 22:25:50,388 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 1023.9ms TimeCoverageRelationStatistics Valid=1617, Invalid=2673, Unknown=0, NotChecked=0, Total=4290 [2021-05-02 22:25:50,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-05-02 22:25:50,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 269. [2021-05-02 22:25:50,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 200 states have (on average 1.01) internal successors, (202), 200 states have internal predecessors, (202), 35 states have call successors, (35), 35 states have call predecessors, (35), 33 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2021-05-02 22:25:50,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 270 transitions. [2021-05-02 22:25:50,391 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 270 transitions. Word has length 260 [2021-05-02 22:25:50,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:25:50,391 INFO L480 AbstractCegarLoop]: Abstraction has 269 states and 270 transitions. [2021-05-02 22:25:50,392 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 5.542857142857143) internal successors, (194), 34 states have internal predecessors, (194), 34 states have call successors, (34), 34 states have call predecessors, (34), 32 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2021-05-02 22:25:50,392 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 270 transitions. [2021-05-02 22:25:50,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2021-05-02 22:25:50,393 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:25:50,393 INFO L523 BasicCegarLoop]: trace histogram [33, 32, 32, 32, 32, 32, 32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:25:50,604 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:25:50,605 INFO L428 AbstractCegarLoop]: === Iteration 68 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:25:50,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:25:50,605 INFO L82 PathProgramCache]: Analyzing trace with hash 20047520, now seen corresponding path program 31 times [2021-05-02 22:25:50,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:25:50,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019998388] [2021-05-02 22:25:50,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:25:50,620 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:25:50,620 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1408259643] [2021-05-02 22:25:50,620 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:25:51,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:25:51,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 766 conjuncts, 147 conjunts are in the unsatisfiable core [2021-05-02 22:25:51,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:25:51,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:52,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:52,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:52,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:52,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:52,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:52,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:52,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:52,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:52,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:52,963 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 152 proven. 2076 refuted. 0 times theorem prover too weak. 1804 trivial. 0 not checked. [2021-05-02 22:25:52,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:25:52,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019998388] [2021-05-02 22:25:52,964 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:25:52,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408259643] [2021-05-02 22:25:52,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408259643] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:25:52,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:25:52,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2021-05-02 22:25:52,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843314267] [2021-05-02 22:25:52,964 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-05-02 22:25:52,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:25:52,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-05-02 22:25:52,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=1406, Unknown=0, NotChecked=0, Total=1482 [2021-05-02 22:25:52,965 INFO L87 Difference]: Start difference. First operand 269 states and 270 transitions. Second operand has 39 states, 38 states have (on average 2.8421052631578947) internal successors, (108), 38 states have internal predecessors, (108), 34 states have call successors, (35), 2 states have call predecessors, (35), 2 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2021-05-02 22:25:54,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:25:54,317 INFO L93 Difference]: Finished difference Result 274 states and 276 transitions. [2021-05-02 22:25:54,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-02 22:25:54,317 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 2.8421052631578947) internal successors, (108), 38 states have internal predecessors, (108), 34 states have call successors, (35), 2 states have call predecessors, (35), 2 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) Word has length 266 [2021-05-02 22:25:54,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:25:54,318 INFO L225 Difference]: With dead ends: 274 [2021-05-02 22:25:54,318 INFO L226 Difference]: Without dead ends: 271 [2021-05-02 22:25:54,318 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 226 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 845.6ms TimeCoverageRelationStatistics Valid=91, Invalid=1631, Unknown=0, NotChecked=0, Total=1722 [2021-05-02 22:25:54,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2021-05-02 22:25:54,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 271. [2021-05-02 22:25:54,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 201 states have (on average 1.0099502487562189) internal successors, (203), 201 states have internal predecessors, (203), 36 states have call successors, (36), 35 states have call predecessors, (36), 33 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2021-05-02 22:25:54,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 273 transitions. [2021-05-02 22:25:54,321 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 273 transitions. Word has length 266 [2021-05-02 22:25:54,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:25:54,322 INFO L480 AbstractCegarLoop]: Abstraction has 271 states and 273 transitions. [2021-05-02 22:25:54,322 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 39 states, 38 states have (on average 2.8421052631578947) internal successors, (108), 38 states have internal predecessors, (108), 34 states have call successors, (35), 2 states have call predecessors, (35), 2 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2021-05-02 22:25:54,322 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 273 transitions. [2021-05-02 22:25:54,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2021-05-02 22:25:54,323 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:25:54,323 INFO L523 BasicCegarLoop]: trace histogram [33, 33, 32, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:25:54,528 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:25:54,529 INFO L428 AbstractCegarLoop]: === Iteration 69 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:25:54,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:25:54,529 INFO L82 PathProgramCache]: Analyzing trace with hash -1353279613, now seen corresponding path program 32 times [2021-05-02 22:25:54,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:25:54,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031741139] [2021-05-02 22:25:54,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:25:54,533 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:25:54,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [12346549] [2021-05-02 22:25:54,533 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:25:54,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 22:25:54,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:25:54,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 777 conjuncts, 69 conjunts are in the unsatisfiable core [2021-05-02 22:25:54,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:25:54,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:54,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:54,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:54,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:54,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:54,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:54,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:54,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:54,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:54,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:54,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:54,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:54,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:54,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:54,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:54,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:54,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:54,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:54,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:54,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:54,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:54,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:54,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:54,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:54,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:54,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:54,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:54,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:54,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:54,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:54,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:54,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:54,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:54,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:54,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:54,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:54,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:54,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:54,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:54,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:54,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:54,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:54,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:54,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:54,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:54,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:54,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:54,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:54,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:54,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:54,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:55,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:55,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:55,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:55,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:55,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:55,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:55,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:55,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:55,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:55,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:55,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:55,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:55,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:55,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:55,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:55,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:55,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:55,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:55,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:55,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:55,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:55,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:55,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:55,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:55,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:55,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:55,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:55,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:55,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:55,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:55,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:55,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:55,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:55,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:55,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:55,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:55,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:55,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:55,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:55,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:55,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:55,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:55,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:55,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:55,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:55,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:55,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:55,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:55,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:55,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:55,579 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 64 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 22:25:55,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:25:55,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031741139] [2021-05-02 22:25:55,580 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:25:55,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12346549] [2021-05-02 22:25:55,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12346549] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:25:55,580 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:25:55,580 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2021-05-02 22:25:55,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31710863] [2021-05-02 22:25:55,580 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-02 22:25:55,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:25:55,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-02 22:25:55,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2021-05-02 22:25:55,581 INFO L87 Difference]: Start difference. First operand 271 states and 273 transitions. Second operand has 36 states, 36 states have (on average 5.555555555555555) internal successors, (200), 35 states have internal predecessors, (200), 35 states have call successors, (35), 35 states have call predecessors, (35), 33 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2021-05-02 22:25:56,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:25:56,643 INFO L93 Difference]: Finished difference Result 277 states and 278 transitions. [2021-05-02 22:25:56,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-05-02 22:25:56,643 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.555555555555555) internal successors, (200), 35 states have internal predecessors, (200), 35 states have call successors, (35), 35 states have call predecessors, (35), 33 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) Word has length 268 [2021-05-02 22:25:56,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:25:56,644 INFO L225 Difference]: With dead ends: 277 [2021-05-02 22:25:56,644 INFO L226 Difference]: Without dead ends: 277 [2021-05-02 22:25:56,645 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 1239.9ms TimeCoverageRelationStatistics Valid=1717, Invalid=2839, Unknown=0, NotChecked=0, Total=4556 [2021-05-02 22:25:56,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2021-05-02 22:25:56,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 277. [2021-05-02 22:25:56,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 206 states have (on average 1.0097087378640777) internal successors, (208), 206 states have internal predecessors, (208), 36 states have call successors, (36), 36 states have call predecessors, (36), 34 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2021-05-02 22:25:56,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 278 transitions. [2021-05-02 22:25:56,649 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 278 transitions. Word has length 268 [2021-05-02 22:25:56,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:25:56,649 INFO L480 AbstractCegarLoop]: Abstraction has 277 states and 278 transitions. [2021-05-02 22:25:56,649 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 5.555555555555555) internal successors, (200), 35 states have internal predecessors, (200), 35 states have call successors, (35), 35 states have call predecessors, (35), 33 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2021-05-02 22:25:56,649 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 278 transitions. [2021-05-02 22:25:56,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2021-05-02 22:25:56,650 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:25:56,650 INFO L523 BasicCegarLoop]: trace histogram [34, 33, 33, 33, 33, 33, 33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:25:56,868 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-05-02 22:25:56,869 INFO L428 AbstractCegarLoop]: === Iteration 70 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:25:56,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:25:56,869 INFO L82 PathProgramCache]: Analyzing trace with hash -150719359, now seen corresponding path program 32 times [2021-05-02 22:25:56,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:25:56,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186551007] [2021-05-02 22:25:56,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:25:56,873 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:25:56,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1485596736] [2021-05-02 22:25:56,874 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:25:57,747 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 22:25:57,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:25:57,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 787 conjuncts, 144 conjunts are in the unsatisfiable core [2021-05-02 22:25:57,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:25:57,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:25:59,821 WARN L860 $PredicateComparison]: unable to prove that (and (= c_main_~c~0 0) (= c_main_~y~0 0) (= (mod (+ (* c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0) (* 2 c_main_~y~0 c_main_~y~0 c_main_~y~0) (* c_main_~y~0 c_main_~y~0)) 4) 0)) is different from true [2021-05-02 22:26:00,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:26:00,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:26:00,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:26:00,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:26:00,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:26:00,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:26:00,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:26:00,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:26:00,925 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 65 proven. 2177 refuted. 0 times theorem prover too weak. 2016 trivial. 32 not checked. [2021-05-02 22:26:00,925 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:26:00,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186551007] [2021-05-02 22:26:00,925 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:26:00,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485596736] [2021-05-02 22:26:00,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485596736] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:26:00,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:26:00,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2021-05-02 22:26:00,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904893690] [2021-05-02 22:26:00,926 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-05-02 22:26:00,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:26:00,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-05-02 22:26:00,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1483, Unknown=1, NotChecked=76, Total=1640 [2021-05-02 22:26:00,927 INFO L87 Difference]: Start difference. First operand 277 states and 278 transitions. Second operand has 41 states, 40 states have (on average 2.775) internal successors, (111), 39 states have internal predecessors, (111), 35 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2021-05-02 22:26:02,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:26:02,323 INFO L93 Difference]: Finished difference Result 282 states and 284 transitions. [2021-05-02 22:26:02,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-05-02 22:26:02,323 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 2.775) internal successors, (111), 39 states have internal predecessors, (111), 35 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) Word has length 274 [2021-05-02 22:26:02,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:26:02,324 INFO L225 Difference]: With dead ends: 282 [2021-05-02 22:26:02,324 INFO L226 Difference]: Without dead ends: 279 [2021-05-02 22:26:02,325 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 2870.9ms TimeCoverageRelationStatistics Valid=95, Invalid=1714, Unknown=1, NotChecked=82, Total=1892 [2021-05-02 22:26:02,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-05-02 22:26:02,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 279. [2021-05-02 22:26:02,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 207 states have (on average 1.0096618357487923) internal successors, (209), 207 states have internal predecessors, (209), 37 states have call successors, (37), 36 states have call predecessors, (37), 34 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2021-05-02 22:26:02,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 281 transitions. [2021-05-02 22:26:02,328 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 281 transitions. Word has length 274 [2021-05-02 22:26:02,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:26:02,328 INFO L480 AbstractCegarLoop]: Abstraction has 279 states and 281 transitions. [2021-05-02 22:26:02,328 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 41 states, 40 states have (on average 2.775) internal successors, (111), 39 states have internal predecessors, (111), 35 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2021-05-02 22:26:02,329 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 281 transitions. [2021-05-02 22:26:02,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2021-05-02 22:26:02,330 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:26:02,330 INFO L523 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:26:02,536 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-05-02 22:26:02,537 INFO L428 AbstractCegarLoop]: === Iteration 71 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:26:02,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:26:02,537 INFO L82 PathProgramCache]: Analyzing trace with hash 2043474212, now seen corresponding path program 33 times [2021-05-02 22:26:02,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:26:02,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290023969] [2021-05-02 22:26:02,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:26:02,542 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:26:02,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1070201971] [2021-05-02 22:26:02,542 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true