/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/egcd-ll_valuebound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 20:18:33,252 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 20:18:33,254 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 20:18:33,296 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 20:18:33,296 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 20:18:33,305 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 20:18:33,308 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 20:18:33,316 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 20:18:33,318 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 20:18:33,324 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 20:18:33,325 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 20:18:33,326 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 20:18:33,326 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 20:18:33,327 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 20:18:33,327 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 20:18:33,328 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 20:18:33,329 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 20:18:33,330 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 20:18:33,331 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 20:18:33,332 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 20:18:33,333 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 20:18:33,353 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 20:18:33,357 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 20:18:33,360 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 20:18:33,368 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 20:18:33,379 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 20:18:33,379 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 20:18:33,380 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 20:18:33,384 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 20:18:33,399 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 20:18:33,400 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 20:18:33,403 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 20:18:33,403 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 20:18:33,403 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 20:18:33,403 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 20:18:33,403 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 20:18:33,404 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 20:18:33,404 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 20:18:33,404 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 20:18:33,405 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 20:18:33,405 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 20:18:33,405 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 20:18:33,405 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 20:18:33,406 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 20:18:33,406 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 20:18:33,406 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 20:18:33,406 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 20:18:33,406 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 20:18:33,406 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 20:18:33,406 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 20:18:33,408 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 20:18:33,408 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 20:18:33,693 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 20:18:33,724 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 20:18:33,727 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 20:18:33,728 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 20:18:33,729 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 20:18:33,730 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_valuebound100.c [2021-05-02 20:18:33,787 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/23225834b/9169bc1e652e44d5b7bdd8ee61b9f9cc/FLAGf7ab07691 [2021-05-02 20:18:34,310 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 20:18:34,310 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_valuebound100.c [2021-05-02 20:18:34,318 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/23225834b/9169bc1e652e44d5b7bdd8ee61b9f9cc/FLAGf7ab07691 [2021-05-02 20:18:34,782 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/23225834b/9169bc1e652e44d5b7bdd8ee61b9f9cc [2021-05-02 20:18:34,784 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 20:18:34,785 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 20:18:34,787 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 20:18:34,787 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 20:18:34,790 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 20:18:34,791 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:18:34" (1/1) ... [2021-05-02 20:18:34,791 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b8fe433 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:18:34, skipping insertion in model container [2021-05-02 20:18:34,792 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:18:34" (1/1) ... [2021-05-02 20:18:34,797 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 20:18:34,813 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 20:18:34,965 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/egcd-ll_valuebound100.c[489,502] [2021-05-02 20:18:34,994 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:18:35,005 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 20:18:35,016 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/egcd-ll_valuebound100.c[489,502] [2021-05-02 20:18:35,041 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:18:35,106 INFO L208 MainTranslator]: Completed translation [2021-05-02 20:18:35,107 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:18:35 WrapperNode [2021-05-02 20:18:35,107 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 20:18:35,110 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 20:18:35,110 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 20:18:35,110 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 20:18:35,127 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:18:35" (1/1) ... [2021-05-02 20:18:35,128 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:18:35" (1/1) ... [2021-05-02 20:18:35,143 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:18:35" (1/1) ... [2021-05-02 20:18:35,143 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:18:35" (1/1) ... [2021-05-02 20:18:35,154 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:18:35" (1/1) ... [2021-05-02 20:18:35,157 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:18:35" (1/1) ... [2021-05-02 20:18:35,158 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:18:35" (1/1) ... [2021-05-02 20:18:35,159 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 20:18:35,160 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 20:18:35,160 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 20:18:35,160 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 20:18:35,161 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:18:35" (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 20:18:35,234 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 20:18:35,234 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 20:18:35,234 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 20:18:35,235 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 20:18:35,235 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 20:18:35,235 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 20:18:35,236 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 20:18:35,236 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 20:18:35,236 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 20:18:35,236 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 20:18:35,237 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 20:18:35,237 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 20:18:35,237 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 20:18:35,237 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 20:18:35,238 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 20:18:35,238 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 20:18:35,238 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 20:18:35,238 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 20:18:35,239 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 20:18:35,239 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 20:18:35,440 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 20:18:35,440 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 20:18:35,442 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:18:35 BoogieIcfgContainer [2021-05-02 20:18:35,442 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 20:18:35,443 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 20:18:35,443 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 20:18:35,443 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 20:18:35,446 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:18:35" (1/1) ... [2021-05-02 20:18:35,461 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:18:35 BasicIcfg [2021-05-02 20:18:35,461 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 20:18:35,462 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 20:18:35,463 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 20:18:35,465 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 20:18:35,465 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 08:18:34" (1/4) ... [2021-05-02 20:18:35,466 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3efa62b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:18:35, skipping insertion in model container [2021-05-02 20:18:35,466 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:18:35" (2/4) ... [2021-05-02 20:18:35,466 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3efa62b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:18:35, skipping insertion in model container [2021-05-02 20:18:35,466 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:18:35" (3/4) ... [2021-05-02 20:18:35,467 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3efa62b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 08:18:35, skipping insertion in model container [2021-05-02 20:18:35,467 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:18:35" (4/4) ... [2021-05-02 20:18:35,468 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd-ll_valuebound100.cJordan [2021-05-02 20:18:35,472 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 20:18:35,476 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 20:18:35,490 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 20:18:35,505 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 20:18:35,505 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 20:18:35,505 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 20:18:35,505 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 20:18:35,505 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 20:18:35,505 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 20:18:35,505 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 20:18:35,506 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 20:18:35,516 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 20:18:35,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 20:18:35,523 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:18:35,523 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:18:35,523 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:18:35,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:18:35,528 INFO L82 PathProgramCache]: Analyzing trace with hash -1381881312, now seen corresponding path program 1 times [2021-05-02 20:18:35,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:18:35,543 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134996788] [2021-05-02 20:18:35,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:18:35,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:18:35,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 20:18:35,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:18:35,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 20:18:35,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:18:35,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 20:18:35,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:18:35,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 20:18:35,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:18:35,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-02 20:18:35,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:18:35,903 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-02 20:18:35,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:18:35,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134996788] [2021-05-02 20:18:35,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134996788] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:18:35,905 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:18:35,906 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 20:18:35,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207757574] [2021-05-02 20:18:35,911 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 20:18:35,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:18:35,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 20:18:35,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:18:35,924 INFO L87 Difference]: Start difference. First operand has 37 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:18:36,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:18:36,057 INFO L93 Difference]: Finished difference Result 37 states and 47 transitions. [2021-05-02 20:18:36,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 20:18:36,059 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-05-02 20:18:36,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:18:36,085 INFO L225 Difference]: With dead ends: 37 [2021-05-02 20:18:36,085 INFO L226 Difference]: Without dead ends: 32 [2021-05-02 20:18:36,087 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 52.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:18:36,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-02 20:18:36,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-02 20:18:36,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 13 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 20:18:36,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2021-05-02 20:18:36,124 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 33 [2021-05-02 20:18:36,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:18:36,124 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2021-05-02 20:18:36,125 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:18:36,125 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2021-05-02 20:18:36,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 20:18:36,127 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:18:36,127 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:18:36,128 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 20:18:36,128 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:18:36,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:18:36,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1975235811, now seen corresponding path program 1 times [2021-05-02 20:18:36,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:18:36,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977534580] [2021-05-02 20:18:36,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:18:36,155 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:18:36,156 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1544002536] [2021-05-02 20:18:36,156 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 20:18:36,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:18:36,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 20:18:36,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:18:36,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:36,386 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 20:18:36,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:18:36,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977534580] [2021-05-02 20:18:36,387 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:18:36,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544002536] [2021-05-02 20:18:36,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544002536] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:18:36,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:18:36,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 20:18:36,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516594209] [2021-05-02 20:18:36,390 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 20:18:36,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:18:36,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 20:18:36,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 20:18:36,392 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-02 20:18:36,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:18:36,494 INFO L93 Difference]: Finished difference Result 46 states and 63 transitions. [2021-05-02 20:18:36,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 20:18:36,495 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 33 [2021-05-02 20:18:36,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:18:36,497 INFO L225 Difference]: With dead ends: 46 [2021-05-02 20:18:36,498 INFO L226 Difference]: Without dead ends: 46 [2021-05-02 20:18:36,500 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 39.8ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:18:36,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-05-02 20:18:36,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2021-05-02 20:18:36,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 23 states have internal predecessors, (26), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-02 20:18:36,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 62 transitions. [2021-05-02 20:18:36,520 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 62 transitions. Word has length 33 [2021-05-02 20:18:36,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:18:36,522 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 62 transitions. [2021-05-02 20:18:36,527 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-02 20:18:36,527 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 62 transitions. [2021-05-02 20:18:36,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-02 20:18:36,528 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:18:36,528 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:18:36,745 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 20:18:36,745 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:18:36,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:18:36,746 INFO L82 PathProgramCache]: Analyzing trace with hash -759782395, now seen corresponding path program 1 times [2021-05-02 20:18:36,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:18:36,746 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263600418] [2021-05-02 20:18:36,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:18:36,761 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:18:36,762 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [639795659] [2021-05-02 20:18:36,762 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 20:18:36,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:18:36,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-02 20:18:36,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:18:36,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:36,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:36,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:36,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:36,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:36,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:36,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:36,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:36,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:36,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:37,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:37,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:37,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:37,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:37,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:37,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:37,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:37,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:37,068 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 20:18:37,069 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:18:37,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263600418] [2021-05-02 20:18:37,069 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:18:37,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639795659] [2021-05-02 20:18:37,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639795659] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:18:37,069 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:18:37,069 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 20:18:37,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822299573] [2021-05-02 20:18:37,070 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 20:18:37,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:18:37,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 20:18:37,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:18:37,071 INFO L87 Difference]: Start difference. First operand 45 states and 62 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2021-05-02 20:18:37,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:18:37,210 INFO L93 Difference]: Finished difference Result 68 states and 100 transitions. [2021-05-02 20:18:37,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 20:18:37,210 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 38 [2021-05-02 20:18:37,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:18:37,214 INFO L225 Difference]: With dead ends: 68 [2021-05-02 20:18:37,214 INFO L226 Difference]: Without dead ends: 68 [2021-05-02 20:18:37,215 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 78.0ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:18:37,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-05-02 20:18:37,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 61. [2021-05-02 20:18:37,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 30 states have (on average 1.3) internal successors, (39), 32 states have internal predecessors, (39), 25 states have call successors, (25), 6 states have call predecessors, (25), 5 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2021-05-02 20:18:37,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 87 transitions. [2021-05-02 20:18:37,235 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 87 transitions. Word has length 38 [2021-05-02 20:18:37,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:18:37,236 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 87 transitions. [2021-05-02 20:18:37,236 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2021-05-02 20:18:37,236 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 87 transitions. [2021-05-02 20:18:37,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-02 20:18:37,238 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:18:37,239 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:18:37,461 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:18:37,462 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:18:37,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:18:37,462 INFO L82 PathProgramCache]: Analyzing trace with hash -1840397536, now seen corresponding path program 1 times [2021-05-02 20:18:37,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:18:37,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308485854] [2021-05-02 20:18:37,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:18:37,476 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:18:37,476 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [829096178] [2021-05-02 20:18:37,476 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 20:18:37,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:18:37,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 20:18:37,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:18:37,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:37,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:37,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:37,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:37,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:37,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:37,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:37,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:37,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:37,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:37,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:37,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:37,736 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 20:18:37,736 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:18:37,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308485854] [2021-05-02 20:18:37,737 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:18:37,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829096178] [2021-05-02 20:18:37,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829096178] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:18:37,737 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:18:37,737 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 20:18:37,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947493045] [2021-05-02 20:18:37,738 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 20:18:37,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:18:37,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 20:18:37,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:18:37,739 INFO L87 Difference]: Start difference. First operand 61 states and 87 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-02 20:18:37,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:18:37,887 INFO L93 Difference]: Finished difference Result 66 states and 91 transitions. [2021-05-02 20:18:37,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 20:18:37,888 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 43 [2021-05-02 20:18:37,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:18:37,889 INFO L225 Difference]: With dead ends: 66 [2021-05-02 20:18:37,889 INFO L226 Difference]: Without dead ends: 64 [2021-05-02 20:18:37,889 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 62.1ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:18:37,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-05-02 20:18:37,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-05-02 20:18:37,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 35 states have internal predecessors, (42), 24 states have call successors, (24), 7 states have call predecessors, (24), 6 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 20:18:37,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 87 transitions. [2021-05-02 20:18:37,895 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 87 transitions. Word has length 43 [2021-05-02 20:18:37,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:18:37,895 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 87 transitions. [2021-05-02 20:18:37,896 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-02 20:18:37,896 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 87 transitions. [2021-05-02 20:18:37,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-05-02 20:18:37,897 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:18:37,897 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:18:38,116 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:18:38,117 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:18:38,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:18:38,118 INFO L82 PathProgramCache]: Analyzing trace with hash -1590647429, now seen corresponding path program 1 times [2021-05-02 20:18:38,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:18:38,118 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074286606] [2021-05-02 20:18:38,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:18:38,136 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:18:38,136 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [28640975] [2021-05-02 20:18:38,136 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 20:18:38,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:18:38,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-02 20:18:38,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:18:38,301 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-05-02 20:18:38,301 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:18:38,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074286606] [2021-05-02 20:18:38,301 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:18:38,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28640975] [2021-05-02 20:18:38,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28640975] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:18:38,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:18:38,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 20:18:38,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121222475] [2021-05-02 20:18:38,303 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 20:18:38,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:18:38,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 20:18:38,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-02 20:18:38,303 INFO L87 Difference]: Start difference. First operand 64 states and 87 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2021-05-02 20:18:38,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:18:38,338 INFO L93 Difference]: Finished difference Result 68 states and 90 transitions. [2021-05-02 20:18:38,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 20:18:38,339 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) Word has length 49 [2021-05-02 20:18:38,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:18:38,340 INFO L225 Difference]: With dead ends: 68 [2021-05-02 20:18:38,340 INFO L226 Difference]: Without dead ends: 68 [2021-05-02 20:18:38,340 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.6ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:18:38,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-05-02 20:18:38,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2021-05-02 20:18:38,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 36 states have (on average 1.25) internal successors, (45), 38 states have internal predecessors, (45), 24 states have call successors, (24), 8 states have call predecessors, (24), 7 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 20:18:38,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 90 transitions. [2021-05-02 20:18:38,346 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 90 transitions. Word has length 49 [2021-05-02 20:18:38,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:18:38,347 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 90 transitions. [2021-05-02 20:18:38,347 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2021-05-02 20:18:38,347 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 90 transitions. [2021-05-02 20:18:38,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-02 20:18:38,348 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:18:38,348 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:18:38,565 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:18:38,566 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:18:38,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:18:38,566 INFO L82 PathProgramCache]: Analyzing trace with hash 1766531305, now seen corresponding path program 1 times [2021-05-02 20:18:38,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:18:38,567 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138125878] [2021-05-02 20:18:38,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:18:38,577 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:18:38,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [331785669] [2021-05-02 20:18:38,578 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 20:18:38,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:18:38,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 20:18:38,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:18:38,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:38,805 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-05-02 20:18:38,806 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:18:38,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138125878] [2021-05-02 20:18:38,806 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:18:38,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331785669] [2021-05-02 20:18:38,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331785669] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:18:38,806 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:18:38,806 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 20:18:38,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139838525] [2021-05-02 20:18:38,807 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 20:18:38,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:18:38,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 20:18:38,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 20:18:38,810 INFO L87 Difference]: Start difference. First operand 68 states and 90 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-05-02 20:18:38,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:18:38,904 INFO L93 Difference]: Finished difference Result 82 states and 106 transitions. [2021-05-02 20:18:38,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 20:18:38,905 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 51 [2021-05-02 20:18:38,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:18:38,906 INFO L225 Difference]: With dead ends: 82 [2021-05-02 20:18:38,906 INFO L226 Difference]: Without dead ends: 82 [2021-05-02 20:18:38,906 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 39.4ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:18:38,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-05-02 20:18:38,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 79. [2021-05-02 20:18:38,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 42 states have (on average 1.2142857142857142) internal successors, (51), 45 states have internal predecessors, (51), 27 states have call successors, (27), 10 states have call predecessors, (27), 9 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2021-05-02 20:18:38,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 102 transitions. [2021-05-02 20:18:38,917 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 102 transitions. Word has length 51 [2021-05-02 20:18:38,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:18:38,917 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 102 transitions. [2021-05-02 20:18:38,917 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-05-02 20:18:38,917 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 102 transitions. [2021-05-02 20:18:38,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-02 20:18:38,918 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:18:38,918 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:18:39,119 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 20:18:39,119 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:18:39,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:18:39,119 INFO L82 PathProgramCache]: Analyzing trace with hash 1046589490, now seen corresponding path program 1 times [2021-05-02 20:18:39,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:18:39,120 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714437482] [2021-05-02 20:18:39,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:18:39,129 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:18:39,130 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [337611105] [2021-05-02 20:18:39,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 20:18:39,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:18:39,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-02 20:18:39,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:18:39,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:39,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:39,368 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 15 proven. 5 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-05-02 20:18:39,368 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:18:39,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714437482] [2021-05-02 20:18:39,369 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:18:39,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337611105] [2021-05-02 20:18:39,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337611105] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:18:39,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:18:39,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 20:18:39,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052508171] [2021-05-02 20:18:39,371 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 20:18:39,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:18:39,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 20:18:39,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:18:39,372 INFO L87 Difference]: Start difference. First operand 79 states and 102 transitions. Second operand has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-02 20:18:39,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:18:39,504 INFO L93 Difference]: Finished difference Result 86 states and 110 transitions. [2021-05-02 20:18:39,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 20:18:39,505 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 54 [2021-05-02 20:18:39,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:18:39,506 INFO L225 Difference]: With dead ends: 86 [2021-05-02 20:18:39,506 INFO L226 Difference]: Without dead ends: 84 [2021-05-02 20:18:39,506 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 55.6ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:18:39,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-05-02 20:18:39,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2021-05-02 20:18:39,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 46 states have (on average 1.1521739130434783) internal successors, (53), 49 states have internal predecessors, (53), 27 states have call successors, (27), 11 states have call predecessors, (27), 10 states have return successors, (25), 23 states have call predecessors, (25), 25 states have call successors, (25) [2021-05-02 20:18:39,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 105 transitions. [2021-05-02 20:18:39,513 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 105 transitions. Word has length 54 [2021-05-02 20:18:39,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:18:39,514 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 105 transitions. [2021-05-02 20:18:39,514 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-02 20:18:39,514 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 105 transitions. [2021-05-02 20:18:39,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-05-02 20:18:39,515 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:18:39,515 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:18:39,718 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:18:39,719 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:18:39,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:18:39,719 INFO L82 PathProgramCache]: Analyzing trace with hash -2126309122, now seen corresponding path program 1 times [2021-05-02 20:18:39,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:18:39,719 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679068453] [2021-05-02 20:18:39,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:18:39,729 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:18:39,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [319226852] [2021-05-02 20:18:39,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 20:18:39,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:18:39,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-02 20:18:39,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:18:39,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:39,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:39,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:39,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:39,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:39,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:39,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:39,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:39,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:39,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:40,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:40,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:40,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:40,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:40,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:40,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:40,118 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 10 proven. 19 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-05-02 20:18:40,118 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:18:40,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679068453] [2021-05-02 20:18:40,118 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:18:40,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319226852] [2021-05-02 20:18:40,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319226852] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:18:40,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:18:40,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 20:18:40,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87590910] [2021-05-02 20:18:40,119 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 20:18:40,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:18:40,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 20:18:40,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:18:40,120 INFO L87 Difference]: Start difference. First operand 84 states and 105 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2021-05-02 20:18:40,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:18:40,359 INFO L93 Difference]: Finished difference Result 116 states and 145 transitions. [2021-05-02 20:18:40,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:18:40,359 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) Word has length 56 [2021-05-02 20:18:40,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:18:40,360 INFO L225 Difference]: With dead ends: 116 [2021-05-02 20:18:40,360 INFO L226 Difference]: Without dead ends: 116 [2021-05-02 20:18:40,361 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 126.8ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:18:40,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-05-02 20:18:40,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 112. [2021-05-02 20:18:40,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 64 states have (on average 1.15625) internal successors, (74), 67 states have internal predecessors, (74), 33 states have call successors, (33), 15 states have call predecessors, (33), 14 states have return successors, (31), 29 states have call predecessors, (31), 31 states have call successors, (31) [2021-05-02 20:18:40,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 138 transitions. [2021-05-02 20:18:40,370 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 138 transitions. Word has length 56 [2021-05-02 20:18:40,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:18:40,370 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 138 transitions. [2021-05-02 20:18:40,370 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2021-05-02 20:18:40,370 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 138 transitions. [2021-05-02 20:18:40,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-02 20:18:40,371 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:18:40,371 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:18:40,576 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:18:40,577 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:18:40,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:18:40,577 INFO L82 PathProgramCache]: Analyzing trace with hash -1746772058, now seen corresponding path program 2 times [2021-05-02 20:18:40,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:18:40,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305268357] [2021-05-02 20:18:40,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:18:40,587 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:18:40,587 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [101642659] [2021-05-02 20:18:40,587 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 20:18:40,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:18:40,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:18:40,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-02 20:18:40,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:18:40,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:40,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:40,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:40,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:40,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:40,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:40,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:40,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:40,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:40,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:40,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:40,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:40,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:40,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:40,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:40,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:40,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:40,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:40,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:40,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:40,875 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 13 proven. 13 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-05-02 20:18:40,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:18:40,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305268357] [2021-05-02 20:18:40,875 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:18:40,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101642659] [2021-05-02 20:18:40,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101642659] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:18:40,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:18:40,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 20:18:40,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007896078] [2021-05-02 20:18:40,876 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 20:18:40,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:18:40,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 20:18:40,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:18:40,877 INFO L87 Difference]: Start difference. First operand 112 states and 138 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2021-05-02 20:18:41,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:18:41,066 INFO L93 Difference]: Finished difference Result 135 states and 176 transitions. [2021-05-02 20:18:41,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 20:18:41,068 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 61 [2021-05-02 20:18:41,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:18:41,072 INFO L225 Difference]: With dead ends: 135 [2021-05-02 20:18:41,072 INFO L226 Difference]: Without dead ends: 131 [2021-05-02 20:18:41,072 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 75.2ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:18:41,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-05-02 20:18:41,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2021-05-02 20:18:41,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 73 states have (on average 1.178082191780822) internal successors, (86), 77 states have internal predecessors, (86), 42 states have call successors, (42), 16 states have call predecessors, (42), 15 states have return successors, (39), 37 states have call predecessors, (39), 39 states have call successors, (39) [2021-05-02 20:18:41,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 167 transitions. [2021-05-02 20:18:41,081 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 167 transitions. Word has length 61 [2021-05-02 20:18:41,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:18:41,081 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 167 transitions. [2021-05-02 20:18:41,081 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2021-05-02 20:18:41,082 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 167 transitions. [2021-05-02 20:18:41,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-02 20:18:41,083 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:18:41,083 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:18:41,287 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-02 20:18:41,287 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:18:41,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:18:41,288 INFO L82 PathProgramCache]: Analyzing trace with hash -296466288, now seen corresponding path program 1 times [2021-05-02 20:18:41,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:18:41,288 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317138590] [2021-05-02 20:18:41,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:18:41,296 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:18:41,296 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [83080907] [2021-05-02 20:18:41,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 20:18:41,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:18:41,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-02 20:18:41,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:18:41,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:41,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:41,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:41,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:41,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:41,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:41,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:41,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:41,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:41,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:41,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:41,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:41,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:41,568 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 18 proven. 13 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-05-02 20:18:41,568 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:18:41,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317138590] [2021-05-02 20:18:41,569 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:18:41,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83080907] [2021-05-02 20:18:41,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83080907] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:18:41,569 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:18:41,569 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 20:18:41,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018012423] [2021-05-02 20:18:41,569 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 20:18:41,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:18:41,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 20:18:41,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:18:41,570 INFO L87 Difference]: Start difference. First operand 131 states and 167 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 20:18:41,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:18:41,779 INFO L93 Difference]: Finished difference Result 149 states and 191 transitions. [2021-05-02 20:18:41,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 20:18:41,780 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 69 [2021-05-02 20:18:41,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:18:41,782 INFO L225 Difference]: With dead ends: 149 [2021-05-02 20:18:41,782 INFO L226 Difference]: Without dead ends: 149 [2021-05-02 20:18:41,782 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 120.0ms TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:18:41,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-05-02 20:18:41,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 147. [2021-05-02 20:18:41,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 81 states have (on average 1.1728395061728396) internal successors, (95), 86 states have internal predecessors, (95), 48 states have call successors, (48), 18 states have call predecessors, (48), 17 states have return successors, (45), 42 states have call predecessors, (45), 45 states have call successors, (45) [2021-05-02 20:18:41,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 188 transitions. [2021-05-02 20:18:41,791 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 188 transitions. Word has length 69 [2021-05-02 20:18:41,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:18:41,791 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 188 transitions. [2021-05-02 20:18:41,791 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 20:18:41,792 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 188 transitions. [2021-05-02 20:18:41,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-02 20:18:41,793 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:18:41,793 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:18:42,012 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:18:42,013 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:18:42,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:18:42,013 INFO L82 PathProgramCache]: Analyzing trace with hash -392102192, now seen corresponding path program 2 times [2021-05-02 20:18:42,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:18:42,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173125160] [2021-05-02 20:18:42,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:18:42,022 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:18:42,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1358849887] [2021-05-02 20:18:42,022 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 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 20:18:42,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:18:42,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:18:42,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-02 20:18:42,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:18:42,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:42,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:42,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:42,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:42,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:42,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:42,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:42,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:42,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:42,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:42,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:42,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:42,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:42,276 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 18 proven. 13 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-05-02 20:18:42,277 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:18:42,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173125160] [2021-05-02 20:18:42,277 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:18:42,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358849887] [2021-05-02 20:18:42,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358849887] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:18:42,277 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:18:42,277 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 20:18:42,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941394608] [2021-05-02 20:18:42,278 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 20:18:42,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:18:42,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 20:18:42,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:18:42,279 INFO L87 Difference]: Start difference. First operand 147 states and 188 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 20:18:42,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:18:42,489 INFO L93 Difference]: Finished difference Result 164 states and 210 transitions. [2021-05-02 20:18:42,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 20:18:42,489 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 69 [2021-05-02 20:18:42,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:18:42,490 INFO L225 Difference]: With dead ends: 164 [2021-05-02 20:18:42,490 INFO L226 Difference]: Without dead ends: 161 [2021-05-02 20:18:42,491 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 127.1ms TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:18:42,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-05-02 20:18:42,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 160. [2021-05-02 20:18:42,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 89 states have (on average 1.1573033707865168) internal successors, (103), 94 states have internal predecessors, (103), 51 states have call successors, (51), 20 states have call predecessors, (51), 19 states have return successors, (48), 45 states have call predecessors, (48), 48 states have call successors, (48) [2021-05-02 20:18:42,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 202 transitions. [2021-05-02 20:18:42,499 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 202 transitions. Word has length 69 [2021-05-02 20:18:42,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:18:42,499 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 202 transitions. [2021-05-02 20:18:42,499 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 20:18:42,499 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 202 transitions. [2021-05-02 20:18:42,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-05-02 20:18:42,500 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:18:42,500 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:18:42,723 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:18:42,723 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:18:42,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:18:42,723 INFO L82 PathProgramCache]: Analyzing trace with hash 1674813879, now seen corresponding path program 2 times [2021-05-02 20:18:42,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:18:42,724 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476584314] [2021-05-02 20:18:42,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:18:42,733 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:18:42,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1512892999] [2021-05-02 20:18:42,733 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 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 20:18:42,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:18:42,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:18:42,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 44 conjunts are in the unsatisfiable core [2021-05-02 20:18:42,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:18:42,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:42,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:42,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:42,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:42,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:42,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:42,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:42,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:42,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:42,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:42,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:42,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:42,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:42,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:42,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:42,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:42,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:42,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:42,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:42,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:42,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:42,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:42,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:42,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:42,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:42,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:43,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:43,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:43,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:43,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:43,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:43,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:43,073 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 20 proven. 18 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-05-02 20:18:43,073 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:18:43,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476584314] [2021-05-02 20:18:43,073 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:18:43,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512892999] [2021-05-02 20:18:43,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512892999] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:18:43,074 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:18:43,074 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 20:18:43,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277963428] [2021-05-02 20:18:43,074 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 20:18:43,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:18:43,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 20:18:43,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:18:43,075 INFO L87 Difference]: Start difference. First operand 160 states and 202 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 20:18:43,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:18:43,277 INFO L93 Difference]: Finished difference Result 188 states and 239 transitions. [2021-05-02 20:18:43,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:18:43,278 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) Word has length 74 [2021-05-02 20:18:43,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:18:43,279 INFO L225 Difference]: With dead ends: 188 [2021-05-02 20:18:43,279 INFO L226 Difference]: Without dead ends: 188 [2021-05-02 20:18:43,280 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 106.4ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:18:43,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-05-02 20:18:43,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 184. [2021-05-02 20:18:43,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 104 states have (on average 1.1634615384615385) internal successors, (121), 109 states have internal predecessors, (121), 57 states have call successors, (57), 23 states have call predecessors, (57), 22 states have return successors, (54), 51 states have call predecessors, (54), 54 states have call successors, (54) [2021-05-02 20:18:43,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 232 transitions. [2021-05-02 20:18:43,288 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 232 transitions. Word has length 74 [2021-05-02 20:18:43,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:18:43,288 INFO L480 AbstractCegarLoop]: Abstraction has 184 states and 232 transitions. [2021-05-02 20:18:43,289 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 20:18:43,289 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 232 transitions. [2021-05-02 20:18:43,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-05-02 20:18:43,289 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:18:43,290 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:18:43,504 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-02 20:18:43,505 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:18:43,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:18:43,505 INFO L82 PathProgramCache]: Analyzing trace with hash -1927051720, now seen corresponding path program 3 times [2021-05-02 20:18:43,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:18:43,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051718566] [2021-05-02 20:18:43,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:18:43,513 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:18:43,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [740966169] [2021-05-02 20:18:43,513 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 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 20:18:43,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 20:18:43,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:18:43,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-02 20:18:43,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:18:43,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:43,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:43,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:43,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:43,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:43,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:43,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:43,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:43,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:43,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:43,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:43,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:43,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:43,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:43,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:43,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:43,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:43,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:43,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:43,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:43,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:43,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:43,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:43,976 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 28 proven. 16 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-05-02 20:18:43,976 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:18:43,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051718566] [2021-05-02 20:18:43,976 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:18:43,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740966169] [2021-05-02 20:18:43,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740966169] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:18:43,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:18:43,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 20:18:43,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41982347] [2021-05-02 20:18:43,977 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 20:18:43,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:18:43,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 20:18:43,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:18:43,978 INFO L87 Difference]: Start difference. First operand 184 states and 232 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-02 20:18:44,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:18:44,223 INFO L93 Difference]: Finished difference Result 211 states and 264 transitions. [2021-05-02 20:18:44,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 20:18:44,224 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) Word has length 74 [2021-05-02 20:18:44,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:18:44,226 INFO L225 Difference]: With dead ends: 211 [2021-05-02 20:18:44,226 INFO L226 Difference]: Without dead ends: 211 [2021-05-02 20:18:44,226 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 165.6ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:18:44,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-05-02 20:18:44,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 197. [2021-05-02 20:18:44,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 114 states have (on average 1.1578947368421053) internal successors, (132), 119 states have internal predecessors, (132), 57 states have call successors, (57), 26 states have call predecessors, (57), 25 states have return successors, (54), 51 states have call predecessors, (54), 54 states have call successors, (54) [2021-05-02 20:18:44,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 243 transitions. [2021-05-02 20:18:44,234 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 243 transitions. Word has length 74 [2021-05-02 20:18:44,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:18:44,234 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 243 transitions. [2021-05-02 20:18:44,234 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-02 20:18:44,234 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 243 transitions. [2021-05-02 20:18:44,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-05-02 20:18:44,235 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:18:44,235 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:18:44,458 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-02 20:18:44,458 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:18:44,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:18:44,459 INFO L82 PathProgramCache]: Analyzing trace with hash 504849037, now seen corresponding path program 4 times [2021-05-02 20:18:44,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:18:44,459 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940303701] [2021-05-02 20:18:44,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:18:44,465 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:18:44,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1049798807] [2021-05-02 20:18:44,465 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 20:18:44,516 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 20:18:44,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:18:44,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 44 conjunts are in the unsatisfiable core [2021-05-02 20:18:44,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:18:44,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:44,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:44,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:44,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:44,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:44,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:44,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:44,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:44,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:44,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:44,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:44,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:44,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:44,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:44,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:44,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:44,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:44,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:44,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:44,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:44,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:44,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:44,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:44,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:44,822 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 42 proven. 18 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2021-05-02 20:18:44,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:18:44,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940303701] [2021-05-02 20:18:44,823 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:18:44,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049798807] [2021-05-02 20:18:44,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049798807] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:18:44,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:18:44,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 20:18:44,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550271090] [2021-05-02 20:18:44,823 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 20:18:44,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:18:44,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 20:18:44,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:18:44,824 INFO L87 Difference]: Start difference. First operand 197 states and 243 transitions. Second operand has 13 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-02 20:18:45,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:18:45,167 INFO L93 Difference]: Finished difference Result 217 states and 270 transitions. [2021-05-02 20:18:45,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 20:18:45,167 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) Word has length 79 [2021-05-02 20:18:45,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:18:45,169 INFO L225 Difference]: With dead ends: 217 [2021-05-02 20:18:45,169 INFO L226 Difference]: Without dead ends: 212 [2021-05-02 20:18:45,169 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 161.7ms TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-05-02 20:18:45,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-05-02 20:18:45,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 175. [2021-05-02 20:18:45,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 103 states have (on average 1.145631067961165) internal successors, (118), 107 states have internal predecessors, (118), 48 states have call successors, (48), 24 states have call predecessors, (48), 23 states have return successors, (45), 43 states have call predecessors, (45), 45 states have call successors, (45) [2021-05-02 20:18:45,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 211 transitions. [2021-05-02 20:18:45,176 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 211 transitions. Word has length 79 [2021-05-02 20:18:45,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:18:45,176 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 211 transitions. [2021-05-02 20:18:45,176 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-02 20:18:45,176 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 211 transitions. [2021-05-02 20:18:45,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-05-02 20:18:45,177 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:18:45,177 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:18:45,389 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-02 20:18:45,389 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:18:45,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:18:45,389 INFO L82 PathProgramCache]: Analyzing trace with hash 1530341036, now seen corresponding path program 3 times [2021-05-02 20:18:45,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:18:45,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239517335] [2021-05-02 20:18:45,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:18:45,397 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:18:45,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [617607922] [2021-05-02 20:18:45,397 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 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 20:18:45,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 20:18:45,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:18:45,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 44 conjunts are in the unsatisfiable core [2021-05-02 20:18:45,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:18:45,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:45,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:45,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:45,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:45,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:45,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:45,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:45,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:45,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:45,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:45,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:45,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:45,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:45,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:45,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:45,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:45,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:45,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:45,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:45,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:45,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:45,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:45,749 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 42 proven. 18 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2021-05-02 20:18:45,749 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:18:45,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239517335] [2021-05-02 20:18:45,749 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:18:45,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617607922] [2021-05-02 20:18:45,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617607922] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:18:45,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:18:45,750 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 20:18:45,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937532900] [2021-05-02 20:18:45,750 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 20:18:45,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:18:45,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 20:18:45,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:18:45,751 INFO L87 Difference]: Start difference. First operand 175 states and 211 transitions. Second operand has 13 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-02 20:18:46,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:18:46,102 INFO L93 Difference]: Finished difference Result 207 states and 256 transitions. [2021-05-02 20:18:46,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 20:18:46,102 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) Word has length 79 [2021-05-02 20:18:46,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:18:46,103 INFO L225 Difference]: With dead ends: 207 [2021-05-02 20:18:46,103 INFO L226 Difference]: Without dead ends: 202 [2021-05-02 20:18:46,104 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 123.2ms TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-05-02 20:18:46,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-05-02 20:18:46,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 199. [2021-05-02 20:18:46,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 118 states have (on average 1.152542372881356) internal successors, (136), 122 states have internal predecessors, (136), 54 states have call successors, (54), 27 states have call predecessors, (54), 26 states have return successors, (51), 49 states have call predecessors, (51), 51 states have call successors, (51) [2021-05-02 20:18:46,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 241 transitions. [2021-05-02 20:18:46,110 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 241 transitions. Word has length 79 [2021-05-02 20:18:46,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:18:46,110 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 241 transitions. [2021-05-02 20:18:46,110 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-02 20:18:46,110 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 241 transitions. [2021-05-02 20:18:46,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-05-02 20:18:46,111 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:18:46,111 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:18:46,324 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:18:46,325 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:18:46,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:18:46,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1037601673, now seen corresponding path program 5 times [2021-05-02 20:18:46,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:18:46,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655068451] [2021-05-02 20:18:46,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:18:46,336 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:18:46,336 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1190856901] [2021-05-02 20:18:46,336 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 20:18:46,429 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-05-02 20:18:46,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:18:46,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-02 20:18:46,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:18:46,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:46,587 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 20 proven. 28 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-05-02 20:18:46,587 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:18:46,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655068451] [2021-05-02 20:18:46,588 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:18:46,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190856901] [2021-05-02 20:18:46,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190856901] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:18:46,588 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:18:46,588 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 20:18:46,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833492630] [2021-05-02 20:18:46,588 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 20:18:46,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:18:46,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 20:18:46,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:18:46,589 INFO L87 Difference]: Start difference. First operand 199 states and 241 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-05-02 20:18:46,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:18:46,723 INFO L93 Difference]: Finished difference Result 229 states and 286 transitions. [2021-05-02 20:18:46,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 20:18:46,723 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 87 [2021-05-02 20:18:46,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:18:46,724 INFO L225 Difference]: With dead ends: 229 [2021-05-02 20:18:46,725 INFO L226 Difference]: Without dead ends: 229 [2021-05-02 20:18:46,725 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 78 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 48.1ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:18:46,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-05-02 20:18:46,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 216. [2021-05-02 20:18:46,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 125 states have (on average 1.16) internal successors, (145), 130 states have internal predecessors, (145), 63 states have call successors, (63), 28 states have call predecessors, (63), 27 states have return successors, (60), 57 states have call predecessors, (60), 60 states have call successors, (60) [2021-05-02 20:18:46,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 268 transitions. [2021-05-02 20:18:46,736 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 268 transitions. Word has length 87 [2021-05-02 20:18:46,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:18:46,738 INFO L480 AbstractCegarLoop]: Abstraction has 216 states and 268 transitions. [2021-05-02 20:18:46,738 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-05-02 20:18:46,739 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 268 transitions. [2021-05-02 20:18:46,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-05-02 20:18:46,740 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:18:46,740 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:18:46,963 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-02 20:18:46,964 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:18:46,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:18:46,964 INFO L82 PathProgramCache]: Analyzing trace with hash -1133237577, now seen corresponding path program 6 times [2021-05-02 20:18:46,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:18:46,964 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472915969] [2021-05-02 20:18:46,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:18:46,969 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:18:46,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2013985491] [2021-05-02 20:18:46,969 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 20:18:47,029 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-02 20:18:47,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:18:47,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-02 20:18:47,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:18:47,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:47,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:47,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:47,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:47,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:47,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:47,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:47,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:47,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:47,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:47,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:47,271 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 27 proven. 24 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-05-02 20:18:47,272 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:18:47,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472915969] [2021-05-02 20:18:47,272 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:18:47,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013985491] [2021-05-02 20:18:47,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013985491] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:18:47,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:18:47,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 20:18:47,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555042929] [2021-05-02 20:18:47,274 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 20:18:47,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:18:47,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 20:18:47,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:18:47,275 INFO L87 Difference]: Start difference. First operand 216 states and 268 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2021-05-02 20:18:47,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:18:47,526 INFO L93 Difference]: Finished difference Result 239 states and 300 transitions. [2021-05-02 20:18:47,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:18:47,527 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) Word has length 87 [2021-05-02 20:18:47,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:18:47,528 INFO L225 Difference]: With dead ends: 239 [2021-05-02 20:18:47,528 INFO L226 Difference]: Without dead ends: 236 [2021-05-02 20:18:47,529 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 145.9ms TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-05-02 20:18:47,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-05-02 20:18:47,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 235. [2021-05-02 20:18:47,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 136 states have (on average 1.1544117647058822) internal successors, (157), 141 states have internal predecessors, (157), 69 states have call successors, (69), 30 states have call predecessors, (69), 29 states have return successors, (66), 63 states have call predecessors, (66), 66 states have call successors, (66) [2021-05-02 20:18:47,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 292 transitions. [2021-05-02 20:18:47,536 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 292 transitions. Word has length 87 [2021-05-02 20:18:47,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:18:47,536 INFO L480 AbstractCegarLoop]: Abstraction has 235 states and 292 transitions. [2021-05-02 20:18:47,537 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2021-05-02 20:18:47,537 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 292 transitions. [2021-05-02 20:18:47,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-05-02 20:18:47,538 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:18:47,538 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:18:47,738 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-02 20:18:47,738 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:18:47,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:18:47,739 INFO L82 PathProgramCache]: Analyzing trace with hash -1104608426, now seen corresponding path program 7 times [2021-05-02 20:18:47,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:18:47,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111949381] [2021-05-02 20:18:47,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:18:47,746 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:18:47,746 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [265618408] [2021-05-02 20:18:47,746 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 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 20:18:47,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:18:47,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-02 20:18:47,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:18:47,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:47,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:47,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:47,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:47,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:47,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:47,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:47,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:47,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:47,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:47,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:47,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:47,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:47,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:47,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:47,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:47,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:47,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:47,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:48,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:48,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:48,058 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 24 proven. 27 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-05-02 20:18:48,058 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:18:48,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111949381] [2021-05-02 20:18:48,059 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:18:48,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265618408] [2021-05-02 20:18:48,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265618408] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:18:48,059 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:18:48,059 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 20:18:48,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142246137] [2021-05-02 20:18:48,059 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 20:18:48,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:18:48,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 20:18:48,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:18:48,060 INFO L87 Difference]: Start difference. First operand 235 states and 292 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-02 20:18:48,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:18:48,362 INFO L93 Difference]: Finished difference Result 249 states and 313 transitions. [2021-05-02 20:18:48,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 20:18:48,362 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 87 [2021-05-02 20:18:48,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:18:48,363 INFO L225 Difference]: With dead ends: 249 [2021-05-02 20:18:48,363 INFO L226 Difference]: Without dead ends: 249 [2021-05-02 20:18:48,364 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 183.3ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-05-02 20:18:48,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-05-02 20:18:48,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 247. [2021-05-02 20:18:48,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 141 states have (on average 1.1560283687943262) internal successors, (163), 147 states have internal predecessors, (163), 75 states have call successors, (75), 31 states have call predecessors, (75), 30 states have return successors, (72), 68 states have call predecessors, (72), 72 states have call successors, (72) [2021-05-02 20:18:48,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 310 transitions. [2021-05-02 20:18:48,371 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 310 transitions. Word has length 87 [2021-05-02 20:18:48,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:18:48,371 INFO L480 AbstractCegarLoop]: Abstraction has 247 states and 310 transitions. [2021-05-02 20:18:48,371 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-02 20:18:48,371 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 310 transitions. [2021-05-02 20:18:48,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-05-02 20:18:48,372 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:18:48,372 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:18:48,585 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-02 20:18:48,585 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:18:48,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:18:48,585 INFO L82 PathProgramCache]: Analyzing trace with hash -942157577, now seen corresponding path program 8 times [2021-05-02 20:18:48,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:18:48,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627834138] [2021-05-02 20:18:48,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:18:48,591 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:18:48,591 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1483535163] [2021-05-02 20:18:48,591 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 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 20:18:48,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:18:48,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:18:48,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-02 20:18:48,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:18:48,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:48,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:48,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:48,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:48,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:48,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:48,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:48,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:48,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:48,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:48,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:48,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:48,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:48,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:48,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:48,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:48,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:48,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:48,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:48,914 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 27 proven. 24 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-05-02 20:18:48,914 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:18:48,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627834138] [2021-05-02 20:18:48,914 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:18:48,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483535163] [2021-05-02 20:18:48,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483535163] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:18:48,914 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:18:48,914 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 20:18:48,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725550994] [2021-05-02 20:18:48,915 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 20:18:48,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:18:48,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 20:18:48,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:18:48,916 INFO L87 Difference]: Start difference. First operand 247 states and 310 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2021-05-02 20:18:49,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:18:49,160 INFO L93 Difference]: Finished difference Result 260 states and 329 transitions. [2021-05-02 20:18:49,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 20:18:49,160 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) Word has length 87 [2021-05-02 20:18:49,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:18:49,161 INFO L225 Difference]: With dead ends: 260 [2021-05-02 20:18:49,161 INFO L226 Difference]: Without dead ends: 257 [2021-05-02 20:18:49,162 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 153.2ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-05-02 20:18:49,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-05-02 20:18:49,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 247. [2021-05-02 20:18:49,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 141 states have (on average 1.1560283687943262) internal successors, (163), 147 states have internal predecessors, (163), 75 states have call successors, (75), 31 states have call predecessors, (75), 30 states have return successors, (72), 68 states have call predecessors, (72), 72 states have call successors, (72) [2021-05-02 20:18:49,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 310 transitions. [2021-05-02 20:18:49,178 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 310 transitions. Word has length 87 [2021-05-02 20:18:49,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:18:49,179 INFO L480 AbstractCegarLoop]: Abstraction has 247 states and 310 transitions. [2021-05-02 20:18:49,179 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2021-05-02 20:18:49,179 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 310 transitions. [2021-05-02 20:18:49,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-05-02 20:18:49,180 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:18:49,180 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:18:49,392 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:18:49,393 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:18:49,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:18:49,393 INFO L82 PathProgramCache]: Analyzing trace with hash -913528426, now seen corresponding path program 9 times [2021-05-02 20:18:49,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:18:49,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666438588] [2021-05-02 20:18:49,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:18:49,399 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:18:49,399 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1922550048] [2021-05-02 20:18:49,399 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 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 20:18:49,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 20:18:49,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:18:49,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-02 20:18:49,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:18:49,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:49,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:49,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:49,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:49,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:49,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:49,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:49,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:49,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:49,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:49,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:49,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:49,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:49,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:49,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:49,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:49,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:49,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:49,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:49,667 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 57 proven. 12 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2021-05-02 20:18:49,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:18:49,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666438588] [2021-05-02 20:18:49,668 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:18:49,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922550048] [2021-05-02 20:18:49,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922550048] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:18:49,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:18:49,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 20:18:49,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490755808] [2021-05-02 20:18:49,668 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 20:18:49,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:18:49,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 20:18:49,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:18:49,669 INFO L87 Difference]: Start difference. First operand 247 states and 310 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 10 states have internal predecessors, (28), 5 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 20:18:55,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:18:55,882 INFO L93 Difference]: Finished difference Result 251 states and 313 transitions. [2021-05-02 20:18:55,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:18:55,883 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 10 states have internal predecessors, (28), 5 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 87 [2021-05-02 20:18:55,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:18:55,884 INFO L225 Difference]: With dead ends: 251 [2021-05-02 20:18:55,884 INFO L226 Difference]: Without dead ends: 248 [2021-05-02 20:18:55,884 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 102.0ms TimeCoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-05-02 20:18:55,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-05-02 20:18:55,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 228. [2021-05-02 20:18:55,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 136 states have (on average 1.1323529411764706) internal successors, (154), 141 states have internal predecessors, (154), 61 states have call successors, (61), 31 states have call predecessors, (61), 30 states have return successors, (59), 55 states have call predecessors, (59), 59 states have call successors, (59) [2021-05-02 20:18:55,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 274 transitions. [2021-05-02 20:18:55,891 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 274 transitions. Word has length 87 [2021-05-02 20:18:55,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:18:55,891 INFO L480 AbstractCegarLoop]: Abstraction has 228 states and 274 transitions. [2021-05-02 20:18:55,892 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 10 states have internal predecessors, (28), 5 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 20:18:55,892 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 274 transitions. [2021-05-02 20:18:55,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-05-02 20:18:55,893 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:18:55,893 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:18:56,104 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:18:56,105 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:18:56,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:18:56,105 INFO L82 PathProgramCache]: Analyzing trace with hash -1009164330, now seen corresponding path program 10 times [2021-05-02 20:18:56,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:18:56,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865936501] [2021-05-02 20:18:56,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:18:56,110 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:18:56,110 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1658997873] [2021-05-02 20:18:56,110 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 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 20:18:56,158 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 20:18:56,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:18:56,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-02 20:18:56,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:18:56,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:56,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:56,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:56,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:56,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:56,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:56,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:56,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:56,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:56,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:56,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:56,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:56,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:56,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:56,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:56,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:56,430 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 24 proven. 27 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-05-02 20:18:56,430 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:18:56,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865936501] [2021-05-02 20:18:56,430 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:18:56,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658997873] [2021-05-02 20:18:56,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658997873] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:18:56,431 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:18:56,431 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 20:18:56,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067917574] [2021-05-02 20:18:56,431 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 20:18:56,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:18:56,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 20:18:56,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:18:56,433 INFO L87 Difference]: Start difference. First operand 228 states and 274 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-02 20:18:56,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:18:56,728 INFO L93 Difference]: Finished difference Result 238 states and 287 transitions. [2021-05-02 20:18:56,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 20:18:56,729 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 87 [2021-05-02 20:18:56,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:18:56,730 INFO L225 Difference]: With dead ends: 238 [2021-05-02 20:18:56,730 INFO L226 Difference]: Without dead ends: 238 [2021-05-02 20:18:56,731 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 194.1ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-05-02 20:18:56,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-05-02 20:18:56,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 234. [2021-05-02 20:18:56,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 140 states have (on average 1.1285714285714286) internal successors, (158), 146 states have internal predecessors, (158), 62 states have call successors, (62), 32 states have call predecessors, (62), 31 states have return successors, (60), 55 states have call predecessors, (60), 60 states have call successors, (60) [2021-05-02 20:18:56,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 280 transitions. [2021-05-02 20:18:56,737 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 280 transitions. Word has length 87 [2021-05-02 20:18:56,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:18:56,738 INFO L480 AbstractCegarLoop]: Abstraction has 234 states and 280 transitions. [2021-05-02 20:18:56,738 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-02 20:18:56,739 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 280 transitions. [2021-05-02 20:18:56,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-05-02 20:18:56,739 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:18:56,739 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:18:56,956 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-05-02 20:18:56,957 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:18:56,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:18:56,957 INFO L82 PathProgramCache]: Analyzing trace with hash -428683728, now seen corresponding path program 3 times [2021-05-02 20:18:56,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:18:56,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259652798] [2021-05-02 20:18:56,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:18:56,963 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:18:56,963 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [435124934] [2021-05-02 20:18:56,963 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 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 20:18:57,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 20:18:57,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:18:57,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-02 20:18:57,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:18:57,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:57,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:18:57,234 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 82 proven. 18 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2021-05-02 20:18:57,234 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:18:57,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259652798] [2021-05-02 20:18:57,234 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:18:57,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435124934] [2021-05-02 20:18:57,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435124934] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:18:57,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:18:57,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 20:18:57,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614628006] [2021-05-02 20:18:57,235 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 20:18:57,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:18:57,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 20:18:57,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:18:57,236 INFO L87 Difference]: Start difference. First operand 234 states and 280 transitions. Second operand has 11 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 6 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 20:19:01,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:19:01,447 INFO L93 Difference]: Finished difference Result 266 states and 321 transitions. [2021-05-02 20:19:01,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 20:19:01,447 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 6 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 92 [2021-05-02 20:19:01,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:19:01,449 INFO L225 Difference]: With dead ends: 266 [2021-05-02 20:19:01,449 INFO L226 Difference]: Without dead ends: 266 [2021-05-02 20:19:01,449 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 97.7ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:19:01,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-05-02 20:19:01,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 252. [2021-05-02 20:19:01,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 152 states have (on average 1.131578947368421) internal successors, (172), 158 states have internal predecessors, (172), 65 states have call successors, (65), 35 states have call predecessors, (65), 34 states have return successors, (63), 58 states have call predecessors, (63), 63 states have call successors, (63) [2021-05-02 20:19:01,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 300 transitions. [2021-05-02 20:19:01,456 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 300 transitions. Word has length 92 [2021-05-02 20:19:01,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:19:01,456 INFO L480 AbstractCegarLoop]: Abstraction has 252 states and 300 transitions. [2021-05-02 20:19:01,456 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 6 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 20:19:01,456 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 300 transitions. [2021-05-02 20:19:01,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-05-02 20:19:01,457 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:19:01,457 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:19:01,672 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-05-02 20:19:01,673 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:19:01,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:19:01,673 INFO L82 PathProgramCache]: Analyzing trace with hash 264417969, now seen corresponding path program 11 times [2021-05-02 20:19:01,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:19:01,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898064203] [2021-05-02 20:19:01,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:19:01,679 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:19:01,679 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [540534196] [2021-05-02 20:19:01,680 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 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 20:19:01,773 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-05-02 20:19:01,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:19:01,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 44 conjunts are in the unsatisfiable core [2021-05-02 20:19:01,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:19:01,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:01,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:01,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:01,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:01,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:01,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:01,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:01,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:01,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:01,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:01,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:01,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:01,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:01,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:01,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:01,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:01,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:01,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:01,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:01,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:02,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:02,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:02,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:02,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:02,072 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 26 proven. 30 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2021-05-02 20:19:02,072 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:19:02,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898064203] [2021-05-02 20:19:02,073 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:19:02,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540534196] [2021-05-02 20:19:02,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540534196] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:19:02,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:19:02,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 20:19:02,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337165943] [2021-05-02 20:19:02,073 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 20:19:02,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:19:02,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 20:19:02,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:19:02,075 INFO L87 Difference]: Start difference. First operand 252 states and 300 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2021-05-02 20:19:02,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:19:02,426 INFO L93 Difference]: Finished difference Result 280 states and 337 transitions. [2021-05-02 20:19:02,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 20:19:02,426 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) Word has length 92 [2021-05-02 20:19:02,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:19:02,428 INFO L225 Difference]: With dead ends: 280 [2021-05-02 20:19:02,428 INFO L226 Difference]: Without dead ends: 280 [2021-05-02 20:19:02,428 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 148.7ms TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-05-02 20:19:02,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-05-02 20:19:02,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 266. [2021-05-02 20:19:02,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 161 states have (on average 1.1304347826086956) internal successors, (182), 167 states have internal predecessors, (182), 68 states have call successors, (68), 37 states have call predecessors, (68), 36 states have return successors, (66), 61 states have call predecessors, (66), 66 states have call successors, (66) [2021-05-02 20:19:02,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 316 transitions. [2021-05-02 20:19:02,435 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 316 transitions. Word has length 92 [2021-05-02 20:19:02,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:19:02,436 INFO L480 AbstractCegarLoop]: Abstraction has 266 states and 316 transitions. [2021-05-02 20:19:02,436 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2021-05-02 20:19:02,436 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 316 transitions. [2021-05-02 20:19:02,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-05-02 20:19:02,437 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:19:02,437 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:19:02,660 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:19:02,660 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:19:02,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:19:02,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1542255729, now seen corresponding path program 12 times [2021-05-02 20:19:02,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:19:02,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024227135] [2021-05-02 20:19:02,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:19:02,669 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:19:02,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1908263288] [2021-05-02 20:19:02,669 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 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 20:19:02,720 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-02 20:19:02,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:19:02,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-02 20:19:02,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:19:02,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:02,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:02,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:02,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:02,955 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 42 proven. 47 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-05-02 20:19:02,955 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:19:02,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024227135] [2021-05-02 20:19:02,955 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:19:02,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908263288] [2021-05-02 20:19:02,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908263288] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:19:02,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:19:02,955 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 20:19:02,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951728642] [2021-05-02 20:19:02,956 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 20:19:02,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:19:02,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 20:19:02,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:19:02,957 INFO L87 Difference]: Start difference. First operand 266 states and 316 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-02 20:19:07,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:19:07,650 INFO L93 Difference]: Finished difference Result 322 states and 402 transitions. [2021-05-02 20:19:07,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 20:19:07,651 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) Word has length 92 [2021-05-02 20:19:07,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:19:07,653 INFO L225 Difference]: With dead ends: 322 [2021-05-02 20:19:07,653 INFO L226 Difference]: Without dead ends: 318 [2021-05-02 20:19:07,653 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 100.1ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:19:07,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-05-02 20:19:07,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 280. [2021-05-02 20:19:07,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 167 states have (on average 1.1377245508982037) internal successors, (190), 173 states have internal predecessors, (190), 76 states have call successors, (76), 37 states have call predecessors, (76), 36 states have return successors, (74), 69 states have call predecessors, (74), 74 states have call successors, (74) [2021-05-02 20:19:07,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 340 transitions. [2021-05-02 20:19:07,661 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 340 transitions. Word has length 92 [2021-05-02 20:19:07,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:19:07,661 INFO L480 AbstractCegarLoop]: Abstraction has 280 states and 340 transitions. [2021-05-02 20:19:07,661 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-02 20:19:07,661 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 340 transitions. [2021-05-02 20:19:07,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-05-02 20:19:07,662 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:19:07,662 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:19:07,881 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-05-02 20:19:07,882 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:19:07,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:19:07,882 INFO L82 PathProgramCache]: Analyzing trace with hash -2059609870, now seen corresponding path program 13 times [2021-05-02 20:19:07,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:19:07,882 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199472284] [2021-05-02 20:19:07,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:19:07,888 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:19:07,888 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1039740176] [2021-05-02 20:19:07,888 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 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 20:19:07,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:19:07,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 46 conjunts are in the unsatisfiable core [2021-05-02 20:19:07,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:19:08,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:08,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:08,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:08,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:08,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:08,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:08,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:08,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:08,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:08,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:08,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:08,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:08,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:08,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:08,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:08,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:08,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:08,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:08,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:08,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:08,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:08,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:08,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:08,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:08,355 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 26 proven. 30 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2021-05-02 20:19:08,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:19:08,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199472284] [2021-05-02 20:19:08,355 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:19:08,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039740176] [2021-05-02 20:19:08,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039740176] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:19:08,356 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:19:08,356 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 20:19:08,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757772486] [2021-05-02 20:19:08,357 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 20:19:08,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:19:08,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 20:19:08,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:19:08,358 INFO L87 Difference]: Start difference. First operand 280 states and 340 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2021-05-02 20:19:08,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:19:08,689 INFO L93 Difference]: Finished difference Result 302 states and 367 transitions. [2021-05-02 20:19:08,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 20:19:08,690 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) Word has length 92 [2021-05-02 20:19:08,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:19:08,692 INFO L225 Difference]: With dead ends: 302 [2021-05-02 20:19:08,692 INFO L226 Difference]: Without dead ends: 302 [2021-05-02 20:19:08,692 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 173.1ms TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-05-02 20:19:08,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-05-02 20:19:08,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 288. [2021-05-02 20:19:08,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 173 states have (on average 1.1329479768786128) internal successors, (196), 179 states have internal predecessors, (196), 76 states have call successors, (76), 39 states have call predecessors, (76), 38 states have return successors, (74), 69 states have call predecessors, (74), 74 states have call successors, (74) [2021-05-02 20:19:08,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 346 transitions. [2021-05-02 20:19:08,706 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 346 transitions. Word has length 92 [2021-05-02 20:19:08,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:19:08,707 INFO L480 AbstractCegarLoop]: Abstraction has 288 states and 346 transitions. [2021-05-02 20:19:08,707 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2021-05-02 20:19:08,708 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 346 transitions. [2021-05-02 20:19:08,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-05-02 20:19:08,708 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:19:08,708 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:19:08,924 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:19:08,925 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:19:08,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:19:08,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1250826676, now seen corresponding path program 14 times [2021-05-02 20:19:08,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:19:08,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246840254] [2021-05-02 20:19:08,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:19:08,932 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:19:08,932 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1247957445] [2021-05-02 20:19:08,932 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 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 20:19:08,981 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:19:08,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:19:08,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-02 20:19:08,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:19:09,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:09,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:09,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:09,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:09,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:09,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:09,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:09,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:09,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:09,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:09,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:09,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:09,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:09,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:09,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:09,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:09,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:09,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:09,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:09,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:09,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:09,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:09,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:09,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:09,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:09,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:09,273 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 28 proven. 33 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2021-05-02 20:19:09,274 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:19:09,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246840254] [2021-05-02 20:19:09,274 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:19:09,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247957445] [2021-05-02 20:19:09,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247957445] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:19:09,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:19:09,274 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 20:19:09,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498376972] [2021-05-02 20:19:09,275 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 20:19:09,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:19:09,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 20:19:09,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:19:09,275 INFO L87 Difference]: Start difference. First operand 288 states and 346 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2021-05-02 20:19:09,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:19:09,582 INFO L93 Difference]: Finished difference Result 326 states and 397 transitions. [2021-05-02 20:19:09,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:19:09,583 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 97 [2021-05-02 20:19:09,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:19:09,584 INFO L225 Difference]: With dead ends: 326 [2021-05-02 20:19:09,584 INFO L226 Difference]: Without dead ends: 322 [2021-05-02 20:19:09,584 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 125.8ms TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:19:09,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-05-02 20:19:09,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 322. [2021-05-02 20:19:09,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 194 states have (on average 1.134020618556701) internal successors, (220), 200 states have internal predecessors, (220), 85 states have call successors, (85), 43 states have call predecessors, (85), 42 states have return successors, (83), 78 states have call predecessors, (83), 83 states have call successors, (83) [2021-05-02 20:19:09,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 388 transitions. [2021-05-02 20:19:09,592 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 388 transitions. Word has length 97 [2021-05-02 20:19:09,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:19:09,593 INFO L480 AbstractCegarLoop]: Abstraction has 322 states and 388 transitions. [2021-05-02 20:19:09,593 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2021-05-02 20:19:09,593 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 388 transitions. [2021-05-02 20:19:09,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-05-02 20:19:09,594 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:19:09,594 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:19:09,808 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-05-02 20:19:09,809 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:19:09,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:19:09,809 INFO L82 PathProgramCache]: Analyzing trace with hash -2018648621, now seen corresponding path program 15 times [2021-05-02 20:19:09,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:19:09,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795078780] [2021-05-02 20:19:09,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:19:09,815 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:19:09,815 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1606922903] [2021-05-02 20:19:09,815 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 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 20:19:09,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 20:19:09,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:19:09,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-02 20:19:09,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:19:16,216 WARN L205 SmtUtils]: Spent 4.02 s on a formula simplification that was a NOOP. DAG size: 31 [2021-05-02 20:19:16,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:16,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:19:16,257 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 71 proven. 29 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-05-02 20:19:16,257 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:19:16,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795078780] [2021-05-02 20:19:16,257 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:19:16,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606922903] [2021-05-02 20:19:16,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606922903] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:19:16,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:19:16,258 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 20:19:16,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651454191] [2021-05-02 20:19:16,258 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 20:19:16,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:19:16,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 20:19:16,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=87, Unknown=1, NotChecked=0, Total=110 [2021-05-02 20:19:16,259 INFO L87 Difference]: Start difference. First operand 322 states and 388 transitions. Second operand has 11 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 6 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-02 20:19:46,790 WARN L205 SmtUtils]: Spent 16.27 s on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2021-05-02 20:20:07,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:20:07,199 INFO L93 Difference]: Finished difference Result 357 states and 447 transitions. [2021-05-02 20:20:07,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 20:20:07,208 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 6 states have call predecessors, (13), 4 states have call successors, (13) Word has length 97 [2021-05-02 20:20:07,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:20:07,209 INFO L225 Difference]: With dead ends: 357 [2021-05-02 20:20:07,209 INFO L226 Difference]: Without dead ends: 353 [2021-05-02 20:20:07,210 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 22431.4ms TimeCoverageRelationStatistics Valid=37, Invalid=144, Unknown=1, NotChecked=0, Total=182 [2021-05-02 20:20:07,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-05-02 20:20:07,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 345. [2021-05-02 20:20:07,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 207 states have (on average 1.1545893719806763) internal successors, (239), 213 states have internal predecessors, (239), 94 states have call successors, (94), 44 states have call predecessors, (94), 43 states have return successors, (92), 87 states have call predecessors, (92), 92 states have call successors, (92) [2021-05-02 20:20:07,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 425 transitions. [2021-05-02 20:20:07,220 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 425 transitions. Word has length 97 [2021-05-02 20:20:07,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:20:07,220 INFO L480 AbstractCegarLoop]: Abstraction has 345 states and 425 transitions. [2021-05-02 20:20:07,221 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 6 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-02 20:20:07,221 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 425 transitions. [2021-05-02 20:20:07,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-05-02 20:20:07,221 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:20:07,222 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:20:07,444 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-05-02 20:20:07,444 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:20:07,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:20:07,444 INFO L82 PathProgramCache]: Analyzing trace with hash 2019996691, now seen corresponding path program 16 times [2021-05-02 20:20:07,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:20:07,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917956859] [2021-05-02 20:20:07,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:20:07,451 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:20:07,451 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [533007214] [2021-05-02 20:20:07,451 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 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 20:20:07,498 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 20:20:07,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:20:07,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 64 conjunts are in the unsatisfiable core [2021-05-02 20:20:07,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:20:07,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:07,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:07,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:07,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:07,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:07,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:07,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:07,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:07,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:07,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:07,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:07,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:07,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:07,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:07,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:07,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:07,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:07,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:07,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:07,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:07,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:07,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:07,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:07,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:07,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:07,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:07,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:07,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:07,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:07,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:07,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:07,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:07,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:07,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:07,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:07,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:07,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:07,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:08,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:08,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:08,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:08,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:08,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:08,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:10,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:10,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:10,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:10,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:10,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:10,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:10,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:10,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:10,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:10,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:10,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:10,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:10,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:10,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:10,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:10,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:10,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:10,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:10,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:10,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:10,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:10,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:10,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:10,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:10,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:10,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:10,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:10,474 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 82 proven. 51 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2021-05-02 20:20:10,475 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:20:10,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917956859] [2021-05-02 20:20:10,475 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:20:10,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533007214] [2021-05-02 20:20:10,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533007214] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:20:10,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:20:10,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-02 20:20:10,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169503410] [2021-05-02 20:20:10,475 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 20:20:10,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:20:10,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 20:20:10,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-05-02 20:20:10,476 INFO L87 Difference]: Start difference. First operand 345 states and 425 transitions. Second operand has 16 states, 15 states have (on average 2.0) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 8 states have call predecessors, (16), 6 states have call successors, (16) [2021-05-02 20:20:11,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:20:11,262 INFO L93 Difference]: Finished difference Result 381 states and 473 transitions. [2021-05-02 20:20:11,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 20:20:11,263 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 8 states have call predecessors, (16), 6 states have call successors, (16) Word has length 97 [2021-05-02 20:20:11,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:20:11,264 INFO L225 Difference]: With dead ends: 381 [2021-05-02 20:20:11,264 INFO L226 Difference]: Without dead ends: 373 [2021-05-02 20:20:11,265 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 461.8ms TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-05-02 20:20:11,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2021-05-02 20:20:11,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 355. [2021-05-02 20:20:11,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 214 states have (on average 1.1495327102803738) internal successors, (246), 221 states have internal predecessors, (246), 95 states have call successors, (95), 46 states have call predecessors, (95), 45 states have return successors, (93), 87 states have call predecessors, (93), 93 states have call successors, (93) [2021-05-02 20:20:11,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 434 transitions. [2021-05-02 20:20:11,273 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 434 transitions. Word has length 97 [2021-05-02 20:20:11,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:20:11,273 INFO L480 AbstractCegarLoop]: Abstraction has 355 states and 434 transitions. [2021-05-02 20:20:11,273 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 8 states have call predecessors, (16), 6 states have call successors, (16) [2021-05-02 20:20:11,273 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 434 transitions. [2021-05-02 20:20:11,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-05-02 20:20:11,274 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:20:11,274 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:20:11,512 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-02 20:20:11,513 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:20:11,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:20:11,513 INFO L82 PathProgramCache]: Analyzing trace with hash -1249478606, now seen corresponding path program 4 times [2021-05-02 20:20:11,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:20:11,514 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823117313] [2021-05-02 20:20:11,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:20:11,519 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:20:11,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1673546846] [2021-05-02 20:20:11,519 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 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 20:20:11,566 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 20:20:11,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:20:11,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 54 conjunts are in the unsatisfiable core [2021-05-02 20:20:11,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:20:11,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:11,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:11,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:11,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:11,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:11,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:11,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:11,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:11,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:11,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:11,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:11,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:11,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:11,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:11,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:11,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:11,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:11,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:11,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:11,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:11,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:11,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:11,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:11,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:11,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:11,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:11,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:11,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:11,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:11,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:11,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:11,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:11,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:11,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:11,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:11,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:11,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:11,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:12,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:12,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:12,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:12,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:12,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:12,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:12,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:12,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:12,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:12,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:12,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:12,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:12,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:12,210 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 61 proven. 72 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2021-05-02 20:20:12,210 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:20:12,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823117313] [2021-05-02 20:20:12,210 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:20:12,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673546846] [2021-05-02 20:20:12,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673546846] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:20:12,211 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:20:12,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-02 20:20:12,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035319689] [2021-05-02 20:20:12,211 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 20:20:12,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:20:12,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 20:20:12,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:20:12,212 INFO L87 Difference]: Start difference. First operand 355 states and 434 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 13 states have internal predecessors, (30), 6 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 8 states have call predecessors, (16), 6 states have call successors, (16) [2021-05-02 20:20:12,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:20:12,770 INFO L93 Difference]: Finished difference Result 390 states and 493 transitions. [2021-05-02 20:20:12,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 20:20:12,773 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 13 states have internal predecessors, (30), 6 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 8 states have call predecessors, (16), 6 states have call successors, (16) Word has length 97 [2021-05-02 20:20:12,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:20:12,775 INFO L225 Difference]: With dead ends: 390 [2021-05-02 20:20:12,775 INFO L226 Difference]: Without dead ends: 383 [2021-05-02 20:20:12,776 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 351.5ms TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-05-02 20:20:12,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2021-05-02 20:20:12,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 383. [2021-05-02 20:20:12,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 229 states have (on average 1.1572052401746724) internal successors, (265), 236 states have internal predecessors, (265), 107 states have call successors, (107), 47 states have call predecessors, (107), 46 states have return successors, (105), 99 states have call predecessors, (105), 105 states have call successors, (105) [2021-05-02 20:20:12,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 477 transitions. [2021-05-02 20:20:12,786 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 477 transitions. Word has length 97 [2021-05-02 20:20:12,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:20:12,787 INFO L480 AbstractCegarLoop]: Abstraction has 383 states and 477 transitions. [2021-05-02 20:20:12,787 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 13 states have internal predecessors, (30), 6 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 8 states have call predecessors, (16), 6 states have call successors, (16) [2021-05-02 20:20:12,787 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 477 transitions. [2021-05-02 20:20:12,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-05-02 20:20:12,788 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:20:12,788 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:20:13,004 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:20:13,005 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:20:13,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:20:13,005 INFO L82 PathProgramCache]: Analyzing trace with hash -1800353058, now seen corresponding path program 17 times [2021-05-02 20:20:13,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:20:13,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890960460] [2021-05-02 20:20:13,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:20:13,014 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:20:13,014 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1347913174] [2021-05-02 20:20:13,014 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 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 20:20:49,157 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-05-02 20:20:49,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:20:49,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-02 20:20:49,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:20:49,463 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 24 proven. 44 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2021-05-02 20:20:49,463 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:20:49,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890960460] [2021-05-02 20:20:49,464 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:20:49,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347913174] [2021-05-02 20:20:49,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347913174] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:20:49,464 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:20:49,464 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 20:20:49,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879310359] [2021-05-02 20:20:49,464 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 20:20:49,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:20:49,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 20:20:49,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:20:49,465 INFO L87 Difference]: Start difference. First operand 383 states and 477 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 6 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) [2021-05-02 20:20:49,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:20:49,678 INFO L93 Difference]: Finished difference Result 397 states and 493 transitions. [2021-05-02 20:20:49,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 20:20:49,679 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 6 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) Word has length 105 [2021-05-02 20:20:49,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:20:49,681 INFO L225 Difference]: With dead ends: 397 [2021-05-02 20:20:49,681 INFO L226 Difference]: Without dead ends: 397 [2021-05-02 20:20:49,681 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 103.7ms TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:20:49,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-05-02 20:20:49,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 393. [2021-05-02 20:20:49,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 236 states have (on average 1.152542372881356) internal successors, (272), 244 states have internal predecessors, (272), 108 states have call successors, (108), 49 states have call predecessors, (108), 48 states have return successors, (106), 99 states have call predecessors, (106), 106 states have call successors, (106) [2021-05-02 20:20:49,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 486 transitions. [2021-05-02 20:20:49,690 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 486 transitions. Word has length 105 [2021-05-02 20:20:49,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:20:49,690 INFO L480 AbstractCegarLoop]: Abstraction has 393 states and 486 transitions. [2021-05-02 20:20:49,690 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 6 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) [2021-05-02 20:20:49,690 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 486 transitions. [2021-05-02 20:20:49,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-05-02 20:20:49,691 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:20:49,691 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:20:49,892 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-05-02 20:20:49,892 INFO L428 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:20:49,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:20:49,893 INFO L82 PathProgramCache]: Analyzing trace with hash -1609273058, now seen corresponding path program 18 times [2021-05-02 20:20:49,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:20:49,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148258668] [2021-05-02 20:20:49,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:20:49,898 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:20:49,898 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [107258293] [2021-05-02 20:20:49,898 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 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 20:20:50,736 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-02 20:20:50,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:20:50,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-02 20:20:50,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:20:50,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:50,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:50,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:50,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:50,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:50,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:50,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:50,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:50,971 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 67 proven. 53 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2021-05-02 20:20:50,971 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:20:50,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148258668] [2021-05-02 20:20:50,971 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:20:50,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107258293] [2021-05-02 20:20:50,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107258293] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:20:50,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:20:50,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 20:20:50,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164791620] [2021-05-02 20:20:50,972 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 20:20:50,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:20:50,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 20:20:50,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:20:50,973 INFO L87 Difference]: Start difference. First operand 393 states and 486 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-05-02 20:20:53,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:20:53,090 INFO L93 Difference]: Finished difference Result 409 states and 498 transitions. [2021-05-02 20:20:53,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 20:20:53,090 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 105 [2021-05-02 20:20:53,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:20:53,092 INFO L225 Difference]: With dead ends: 409 [2021-05-02 20:20:53,092 INFO L226 Difference]: Without dead ends: 409 [2021-05-02 20:20:53,092 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 96 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 66.8ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:20:53,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2021-05-02 20:20:53,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 402. [2021-05-02 20:20:53,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 245 states have (on average 1.146938775510204) internal successors, (281), 252 states have internal predecessors, (281), 105 states have call successors, (105), 52 states have call predecessors, (105), 51 states have return successors, (103), 97 states have call predecessors, (103), 103 states have call successors, (103) [2021-05-02 20:20:53,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 489 transitions. [2021-05-02 20:20:53,102 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 489 transitions. Word has length 105 [2021-05-02 20:20:53,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:20:53,102 INFO L480 AbstractCegarLoop]: Abstraction has 402 states and 489 transitions. [2021-05-02 20:20:53,103 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-05-02 20:20:53,103 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 489 transitions. [2021-05-02 20:20:53,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-05-02 20:20:53,104 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:20:53,104 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:20:53,311 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:20:53,311 INFO L428 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:20:53,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:20:53,312 INFO L82 PathProgramCache]: Analyzing trace with hash 1190597354, now seen corresponding path program 19 times [2021-05-02 20:20:53,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:20:53,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225693826] [2021-05-02 20:20:53,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:20:53,319 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:20:53,319 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1138451749] [2021-05-02 20:20:53,319 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 20:20:53,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:20:53,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 51 conjunts are in the unsatisfiable core [2021-05-02 20:20:53,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:20:53,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:53,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:53,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:53,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:53,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:53,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:53,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:53,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:53,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:53,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:53,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:53,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:53,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:53,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:53,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:53,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:53,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:53,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:53,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:53,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:53,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:53,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:53,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:53,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:53,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:53,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:53,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:53,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:53,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:53,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:53,837 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 32 proven. 51 refuted. 0 times theorem prover too weak. 327 trivial. 0 not checked. [2021-05-02 20:20:53,837 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:20:53,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225693826] [2021-05-02 20:20:53,837 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:20:53,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138451749] [2021-05-02 20:20:53,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138451749] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:20:53,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:20:53,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 20:20:53,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921929553] [2021-05-02 20:20:53,838 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 20:20:53,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:20:53,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 20:20:53,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:20:53,839 INFO L87 Difference]: Start difference. First operand 402 states and 489 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 11 states have internal predecessors, (30), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2021-05-02 20:20:54,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:20:54,328 INFO L93 Difference]: Finished difference Result 432 states and 526 transitions. [2021-05-02 20:20:54,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 20:20:54,329 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 11 states have internal predecessors, (30), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) Word has length 110 [2021-05-02 20:20:54,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:20:54,330 INFO L225 Difference]: With dead ends: 432 [2021-05-02 20:20:54,330 INFO L226 Difference]: Without dead ends: 432 [2021-05-02 20:20:54,331 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 236.2ms TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:20:54,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2021-05-02 20:20:54,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 428. [2021-05-02 20:20:54,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 262 states have (on average 1.1488549618320612) internal successors, (301), 268 states have internal predecessors, (301), 110 states have call successors, (110), 56 states have call predecessors, (110), 55 states have return successors, (108), 103 states have call predecessors, (108), 108 states have call successors, (108) [2021-05-02 20:20:54,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 519 transitions. [2021-05-02 20:20:54,340 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 519 transitions. Word has length 110 [2021-05-02 20:20:54,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:20:54,340 INFO L480 AbstractCegarLoop]: Abstraction has 428 states and 519 transitions. [2021-05-02 20:20:54,340 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 11 states have internal predecessors, (30), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2021-05-02 20:20:54,340 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 519 transitions. [2021-05-02 20:20:54,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-05-02 20:20:54,341 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:20:54,342 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:20:54,563 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-05-02 20:20:54,564 INFO L428 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:20:54,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:20:54,564 INFO L82 PathProgramCache]: Analyzing trace with hash -1826532182, now seen corresponding path program 20 times [2021-05-02 20:20:54,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:20:54,564 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186920589] [2021-05-02 20:20:54,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:20:54,570 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:20:54,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1859983733] [2021-05-02 20:20:54,571 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 20:20:54,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:20:54,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:20:54,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 70 conjunts are in the unsatisfiable core [2021-05-02 20:20:54,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:20:54,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:54,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:54,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:54,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:54,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:54,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:54,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:54,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:54,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:54,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:54,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:54,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:54,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:54,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:54,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:54,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:54,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:54,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:54,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:54,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:54,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:54,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:54,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:54,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:54,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:54,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:55,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:55,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:55,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:55,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:55,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:55,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:55,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:55,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:55,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:55,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:55,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:55,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:55,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:55,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:20:55,147 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 104 proven. 69 refuted. 0 times theorem prover too weak. 237 trivial. 0 not checked. [2021-05-02 20:20:55,147 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:20:55,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186920589] [2021-05-02 20:20:55,147 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:20:55,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859983733] [2021-05-02 20:20:55,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859983733] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:20:55,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:20:55,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 20:20:55,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342641904] [2021-05-02 20:20:55,148 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 20:20:55,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:20:55,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 20:20:55,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-05-02 20:20:55,149 INFO L87 Difference]: Start difference. First operand 428 states and 519 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 12 states have internal predecessors, (33), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2021-05-02 20:20:55,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:20:55,758 INFO L93 Difference]: Finished difference Result 468 states and 569 transitions. [2021-05-02 20:20:55,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 20:20:55,759 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 12 states have internal predecessors, (33), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) Word has length 110 [2021-05-02 20:20:55,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:20:55,761 INFO L225 Difference]: With dead ends: 468 [2021-05-02 20:20:55,761 INFO L226 Difference]: Without dead ends: 468 [2021-05-02 20:20:55,761 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 94 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 279.5ms TimeCoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-05-02 20:20:55,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2021-05-02 20:20:55,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 454. [2021-05-02 20:20:55,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 279 states have (on average 1.146953405017921) internal successors, (320), 284 states have internal predecessors, (320), 115 states have call successors, (115), 60 states have call predecessors, (115), 59 states have return successors, (113), 109 states have call predecessors, (113), 113 states have call successors, (113) [2021-05-02 20:20:55,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 548 transitions. [2021-05-02 20:20:55,770 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 548 transitions. Word has length 110 [2021-05-02 20:20:55,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:20:55,770 INFO L480 AbstractCegarLoop]: Abstraction has 454 states and 548 transitions. [2021-05-02 20:20:55,771 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 12 states have internal predecessors, (33), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2021-05-02 20:20:55,771 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 548 transitions. [2021-05-02 20:20:55,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-05-02 20:20:55,772 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:20:55,772 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:20:55,984 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-05-02 20:20:55,985 INFO L428 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:20:55,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:20:55,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1133430485, now seen corresponding path program 21 times [2021-05-02 20:20:55,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:20:55,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223396453] [2021-05-02 20:20:55,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:20:55,991 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:20:55,991 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1257280488] [2021-05-02 20:20:55,991 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 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