/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_unwindbound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 10:25:16,704 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 10:25:16,709 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 10:25:16,744 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 10:25:16,744 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 10:25:16,747 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 10:25:16,749 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 10:25:16,753 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 10:25:16,755 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 10:25:16,759 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 10:25:16,759 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 10:25:16,760 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 10:25:16,760 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 10:25:16,761 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 10:25:16,761 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 10:25:16,762 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 10:25:16,762 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 10:25:16,763 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 10:25:16,763 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 10:25:16,764 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 10:25:16,765 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 10:25:16,769 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 10:25:16,771 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 10:25:16,773 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 10:25:16,779 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 10:25:16,784 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 10:25:16,784 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 10:25:16,785 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 10:25:16,789 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 10:25:16,800 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 10:25:16,800 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 10:25:16,802 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 10:25:16,803 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 10:25:16,803 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 10:25:16,803 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 10:25:16,803 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 10:25:16,803 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 10:25:16,803 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 10:25:16,803 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 10:25:16,804 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 10:25:16,804 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 10:25:16,804 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 10:25:16,804 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 10:25:16,804 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 10:25:16,804 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 10:25:16,804 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 10:25:16,805 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 10:25:16,805 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 10:25:16,805 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 10:25:16,805 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 10:25:16,806 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 10:25:16,806 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 10:25:17,011 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 10:25:17,024 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 10:25:17,025 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 10:25:17,026 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 10:25:17,026 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 10:25:17,027 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_unwindbound50.c [2021-05-06 10:25:17,068 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/97fe9517e/bcea017d9173418680738251b32066af/FLAGc9b91dad8 [2021-05-06 10:25:17,397 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 10:25:17,397 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_unwindbound50.c [2021-05-06 10:25:17,401 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/97fe9517e/bcea017d9173418680738251b32066af/FLAGc9b91dad8 [2021-05-06 10:25:17,825 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/97fe9517e/bcea017d9173418680738251b32066af [2021-05-06 10:25:17,827 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 10:25:17,828 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 10:25:17,829 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 10:25:17,829 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 10:25:17,835 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 10:25:17,836 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 10:25:17" (1/1) ... [2021-05-06 10:25:17,837 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66734474 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:25:17, skipping insertion in model container [2021-05-06 10:25:17,837 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 10:25:17" (1/1) ... [2021-05-06 10:25:17,842 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 10:25:17,851 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 10:25:17,929 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_unwindbound50.c[458,471] [2021-05-06 10:25:17,937 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 10:25:17,942 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 10:25:17,959 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_unwindbound50.c[458,471] [2021-05-06 10:25:17,962 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 10:25:17,981 INFO L208 MainTranslator]: Completed translation [2021-05-06 10:25:17,981 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:25:17 WrapperNode [2021-05-06 10:25:17,981 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 10:25:17,982 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 10:25:17,982 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 10:25:17,982 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 10:25:17,989 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:25:17" (1/1) ... [2021-05-06 10:25:17,989 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:25:17" (1/1) ... [2021-05-06 10:25:17,993 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:25:17" (1/1) ... [2021-05-06 10:25:17,993 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:25:17" (1/1) ... [2021-05-06 10:25:17,996 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:25:17" (1/1) ... [2021-05-06 10:25:17,998 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:25:17" (1/1) ... [2021-05-06 10:25:17,999 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:25:17" (1/1) ... [2021-05-06 10:25:18,000 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 10:25:18,001 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 10:25:18,001 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 10:25:18,001 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 10:25:18,001 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:25:17" (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 [2021-05-06 10:25:18,065 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 10:25:18,065 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 10:25:18,065 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 10:25:18,065 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 10:25:18,066 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 10:25:18,066 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 10:25:18,066 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 10:25:18,066 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 10:25:18,066 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 10:25:18,066 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 10:25:18,067 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2021-05-06 10:25:18,067 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 10:25:18,067 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 10:25:18,067 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 10:25:18,067 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 10:25:18,067 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 10:25:18,067 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 10:25:18,068 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 10:25:18,068 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 10:25:18,068 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 10:25:18,252 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 10:25:18,253 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 10:25:18,254 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 10:25:18 BoogieIcfgContainer [2021-05-06 10:25:18,254 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 10:25:18,254 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 10:25:18,254 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 10:25:18,255 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 10:25:18,256 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 10:25:18" (1/1) ... [2021-05-06 10:25:18,266 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 10:25:18 BasicIcfg [2021-05-06 10:25:18,266 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 10:25:18,267 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 10:25:18,267 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 10:25:18,269 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 10:25:18,269 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 10:25:17" (1/4) ... [2021-05-06 10:25:18,270 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29905919 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 10:25:18, skipping insertion in model container [2021-05-06 10:25:18,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 10:25:17" (2/4) ... [2021-05-06 10:25:18,270 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29905919 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 10:25:18, skipping insertion in model container [2021-05-06 10:25:18,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 10:25:18" (3/4) ... [2021-05-06 10:25:18,270 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29905919 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 10:25:18, skipping insertion in model container [2021-05-06 10:25:18,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 10:25:18" (4/4) ... [2021-05-06 10:25:18,271 INFO L111 eAbstractionObserver]: Analyzing ICFG ps4-ll_unwindbound50.cJordan [2021-05-06 10:25:18,274 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 10:25:18,277 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 10:25:18,287 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 10:25:18,299 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 10:25:18,299 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 10:25:18,300 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 10:25:18,300 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 10:25:18,300 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 10:25:18,300 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 10:25:18,300 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 10:25:18,300 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 10:25:18,308 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 10:25:18,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-06 10:25:18,313 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:25:18,313 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:25:18,314 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:25:18,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:25:18,317 INFO L82 PathProgramCache]: Analyzing trace with hash 1984627219, now seen corresponding path program 1 times [2021-05-06 10:25:18,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:25:18,323 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593675958] [2021-05-06 10:25:18,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:25:18,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:25:18,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 10:25:18,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:25:18,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 10:25:18,510 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:25:18,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593675958] [2021-05-06 10:25:18,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593675958] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 10:25:18,511 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 10:25:18,511 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 10:25:18,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233079036] [2021-05-06 10:25:18,514 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 10:25:18,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:25:18,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 10:25:18,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 10:25:18,531 INFO L87 Difference]: Start difference. First operand has 23 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 10:25:18,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:25:18,600 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2021-05-06 10:25:18,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 10:25:18,602 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-05-06 10:25:18,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:25:18,606 INFO L225 Difference]: With dead ends: 24 [2021-05-06 10:25:18,606 INFO L226 Difference]: Without dead ends: 19 [2021-05-06 10:25:18,607 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 47.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 10:25:18,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-05-06 10:25:18,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2021-05-06 10:25:18,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 10:25:18,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2021-05-06 10:25:18,629 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 11 [2021-05-06 10:25:18,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:25:18,629 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2021-05-06 10:25:18,629 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 10:25:18,629 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2021-05-06 10:25:18,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-06 10:25:18,630 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:25:18,630 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:25:18,630 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 10:25:18,630 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:25:18,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:25:18,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1423332195, now seen corresponding path program 1 times [2021-05-06 10:25:18,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:25:18,634 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965201291] [2021-05-06 10:25:18,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:25:18,649 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:25:18,650 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [455353510] [2021-05-06 10:25:18,650 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 [2021-05-06 10:25:18,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:25:18,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 10:25:18,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:25:18,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:25:18,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:25:18,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:25:18,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:25:18,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:25:18,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 10:25:18,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:25:18,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965201291] [2021-05-06 10:25:18,805 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:25:18,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455353510] [2021-05-06 10:25:18,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455353510] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 10:25:18,806 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 10:25:18,806 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 10:25:18,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925251077] [2021-05-06 10:25:18,807 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 10:25:18,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:25:18,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 10:25:18,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 10:25:18,808 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 10:25:18,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:25:18,815 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2021-05-06 10:25:18,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 10:25:18,816 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-06 10:25:18,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:25:18,816 INFO L225 Difference]: With dead ends: 20 [2021-05-06 10:25:18,816 INFO L226 Difference]: Without dead ends: 20 [2021-05-06 10:25:18,817 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.9ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 10:25:18,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-05-06 10:25:18,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-05-06 10:25:18,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 10:25:18,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2021-05-06 10:25:18,821 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 12 [2021-05-06 10:25:18,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:25:18,821 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2021-05-06 10:25:18,821 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 10:25:18,821 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2021-05-06 10:25:18,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-06 10:25:18,821 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:25:18,822 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:25:19,022 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 10:25:19,022 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:25:19,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:25:19,023 INFO L82 PathProgramCache]: Analyzing trace with hash 1424404671, now seen corresponding path program 1 times [2021-05-06 10:25:19,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:25:19,023 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364357276] [2021-05-06 10:25:19,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:25:19,032 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:25:19,032 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [164452982] [2021-05-06 10:25:19,032 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 [2021-05-06 10:25:19,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:25:19,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 10:25:19,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:25:19,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:25:19,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 10:25:19,127 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:25:19,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364357276] [2021-05-06 10:25:19,127 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:25:19,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164452982] [2021-05-06 10:25:19,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164452982] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 10:25:19,127 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 10:25:19,128 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 10:25:19,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242995879] [2021-05-06 10:25:19,128 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 10:25:19,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:25:19,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 10:25:19,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 10:25:19,129 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 10:25:19,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:25:19,156 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2021-05-06 10:25:19,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 10:25:19,156 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-06 10:25:19,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:25:19,157 INFO L225 Difference]: With dead ends: 28 [2021-05-06 10:25:19,157 INFO L226 Difference]: Without dead ends: 26 [2021-05-06 10:25:19,157 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.1ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 10:25:19,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-06 10:25:19,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-05-06 10:25:19,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 10:25:19,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2021-05-06 10:25:19,161 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 12 [2021-05-06 10:25:19,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:25:19,161 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2021-05-06 10:25:19,161 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 10:25:19,162 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2021-05-06 10:25:19,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-06 10:25:19,162 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:25:19,162 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:25:19,384 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:25:19,385 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:25:19,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:25:19,385 INFO L82 PathProgramCache]: Analyzing trace with hash -381498108, now seen corresponding path program 1 times [2021-05-06 10:25:19,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:25:19,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445099164] [2021-05-06 10:25:19,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:25:19,398 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:25:19,398 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1950422080] [2021-05-06 10:25:19,398 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 [2021-05-06 10:25:19,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:25:19,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 10:25:19,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:25:19,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:25:19,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:25:19,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:25:19,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:25:19,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:25:19,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:25:19,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:25:19,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:25:19,495 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 10:25:19,496 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:25:19,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445099164] [2021-05-06 10:25:19,496 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:25:19,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950422080] [2021-05-06 10:25:19,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950422080] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:25:19,496 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:25:19,496 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-06 10:25:19,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930122979] [2021-05-06 10:25:19,497 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 10:25:19,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:25:19,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 10:25:19,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 10:25:19,497 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 10:25:19,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:25:19,516 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2021-05-06 10:25:19,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 10:25:19,516 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2021-05-06 10:25:19,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:25:19,517 INFO L225 Difference]: With dead ends: 28 [2021-05-06 10:25:19,517 INFO L226 Difference]: Without dead ends: 28 [2021-05-06 10:25:19,517 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 10.8ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 10:25:19,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-05-06 10:25:19,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-05-06 10:25:19,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 10:25:19,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2021-05-06 10:25:19,519 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 20 [2021-05-06 10:25:19,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:25:19,520 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2021-05-06 10:25:19,520 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 10:25:19,520 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2021-05-06 10:25:19,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-06 10:25:19,520 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:25:19,520 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:25:19,725 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:25:19,725 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:25:19,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:25:19,725 INFO L82 PathProgramCache]: Analyzing trace with hash -380425632, now seen corresponding path program 1 times [2021-05-06 10:25:19,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:25:19,726 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747234295] [2021-05-06 10:25:19,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:25:19,732 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:25:19,732 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1110144182] [2021-05-06 10:25:19,732 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 [2021-05-06 10:25:19,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:25:19,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 10:25:19,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:25:19,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:25:19,857 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 10:25:19,858 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:25:19,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747234295] [2021-05-06 10:25:19,858 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:25:19,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110144182] [2021-05-06 10:25:19,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110144182] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:25:19,858 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:25:19,858 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 10:25:19,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347728799] [2021-05-06 10:25:19,858 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 10:25:19,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:25:19,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 10:25:19,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 10:25:19,859 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 10:25:19,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:25:19,899 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2021-05-06 10:25:19,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 10:25:19,899 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2021-05-06 10:25:19,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:25:19,902 INFO L225 Difference]: With dead ends: 36 [2021-05-06 10:25:19,902 INFO L226 Difference]: Without dead ends: 35 [2021-05-06 10:25:19,902 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.1ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 10:25:19,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-06 10:25:19,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-06 10:25:19,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 24 states have internal predecessors, (26), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 10:25:19,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2021-05-06 10:25:19,913 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 20 [2021-05-06 10:25:19,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:25:19,913 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2021-05-06 10:25:19,913 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 10:25:19,913 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2021-05-06 10:25:19,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-06 10:25:19,914 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:25:19,914 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:25:20,133 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:25:20,134 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:25:20,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:25:20,134 INFO L82 PathProgramCache]: Analyzing trace with hash 1647871298, now seen corresponding path program 1 times [2021-05-06 10:25:20,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:25:20,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17590373] [2021-05-06 10:25:20,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:25:20,147 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:25:20,147 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1714734372] [2021-05-06 10:25:20,147 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 [2021-05-06 10:25:20,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:25:20,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 10:25:20,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:25:20,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:25:20,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:25:20,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:25:20,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:25:20,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:25:20,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:25:20,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:25:20,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:25:20,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:25:20,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:25:20,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:13,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:13,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:13,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:13,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:13,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:13,151 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-06 10:27:13,152 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:27:13,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17590373] [2021-05-06 10:27:13,152 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:27:13,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714734372] [2021-05-06 10:27:13,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714734372] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:27:13,152 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:27:13,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 10:27:13,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486989163] [2021-05-06 10:27:13,152 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 10:27:13,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:27:13,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 10:27:13,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=70, Unknown=1, NotChecked=0, Total=90 [2021-05-06 10:27:13,153 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 10:27:13,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:27:13,239 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2021-05-06 10:27:13,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 10:27:13,239 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 26 [2021-05-06 10:27:13,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:27:13,239 INFO L225 Difference]: With dead ends: 39 [2021-05-06 10:27:13,240 INFO L226 Difference]: Without dead ends: 34 [2021-05-06 10:27:13,240 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 112833.2ms TimeCoverageRelationStatistics Valid=35, Invalid=120, Unknown=1, NotChecked=0, Total=156 [2021-05-06 10:27:13,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-06 10:27:13,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-05-06 10:27:13,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 10:27:13,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2021-05-06 10:27:13,244 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 26 [2021-05-06 10:27:13,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:27:13,244 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2021-05-06 10:27:13,244 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 10:27:13,244 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2021-05-06 10:27:13,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 10:27:13,245 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:27:13,245 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:27:13,456 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-06 10:27:13,457 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:27:13,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:27:13,457 INFO L82 PathProgramCache]: Analyzing trace with hash -382724699, now seen corresponding path program 2 times [2021-05-06 10:27:13,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:27:13,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681044269] [2021-05-06 10:27:13,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:27:13,464 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:27:13,464 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2012884715] [2021-05-06 10:27:13,464 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:27:13,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 10:27:13,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:27:13,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 10:27:13,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:27:13,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:13,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:13,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:13,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:13,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:13,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:13,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:13,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:13,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:13,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:13,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:13,601 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 10:27:13,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:27:13,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681044269] [2021-05-06 10:27:13,601 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:27:13,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012884715] [2021-05-06 10:27:13,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012884715] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:27:13,602 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:27:13,602 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 10:27:13,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643763880] [2021-05-06 10:27:13,602 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 10:27:13,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:27:13,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 10:27:13,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 10:27:13,603 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 10:27:13,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:27:13,635 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2021-05-06 10:27:13,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 10:27:13,640 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2021-05-06 10:27:13,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:27:13,641 INFO L225 Difference]: With dead ends: 36 [2021-05-06 10:27:13,641 INFO L226 Difference]: Without dead ends: 36 [2021-05-06 10:27:13,642 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 21.9ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-06 10:27:13,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-06 10:27:13,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-05-06 10:27:13,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 24 states have (on average 1.125) internal successors, (27), 25 states have internal predecessors, (27), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 10:27:13,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2021-05-06 10:27:13,647 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 28 [2021-05-06 10:27:13,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:27:13,647 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2021-05-06 10:27:13,647 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 10:27:13,647 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2021-05-06 10:27:13,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 10:27:13,648 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:27:13,648 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:27:13,856 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:27:13,857 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:27:13,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:27:13,857 INFO L82 PathProgramCache]: Analyzing trace with hash -381652223, now seen corresponding path program 2 times [2021-05-06 10:27:13,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:27:13,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660871713] [2021-05-06 10:27:13,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:27:13,863 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:27:13,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1160491519] [2021-05-06 10:27:13,863 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:27:13,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 10:27:13,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:27:13,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-06 10:27:13,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:27:14,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:14,027 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-06 10:27:14,027 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:27:14,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660871713] [2021-05-06 10:27:14,027 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:27:14,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160491519] [2021-05-06 10:27:14,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160491519] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:27:14,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:27:14,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 10:27:14,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112506420] [2021-05-06 10:27:14,027 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 10:27:14,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:27:14,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 10:27:14,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-06 10:27:14,028 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 10:27:27,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:27:27,789 INFO L93 Difference]: Finished difference Result 44 states and 49 transitions. [2021-05-06 10:27:27,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 10:27:27,789 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2021-05-06 10:27:27,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:27:27,790 INFO L225 Difference]: With dead ends: 44 [2021-05-06 10:27:27,790 INFO L226 Difference]: Without dead ends: 43 [2021-05-06 10:27:27,790 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 56.1ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-06 10:27:27,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-06 10:27:27,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-05-06 10:27:27,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 30 states have internal predecessors, (32), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 10:27:27,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2021-05-06 10:27:27,792 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 28 [2021-05-06 10:27:27,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:27:27,793 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2021-05-06 10:27:27,793 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 10:27:27,793 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2021-05-06 10:27:27,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-06 10:27:27,793 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:27:27,793 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:27:27,997 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:27:27,997 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:27:27,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:27:27,997 INFO L82 PathProgramCache]: Analyzing trace with hash 31133987, now seen corresponding path program 2 times [2021-05-06 10:27:27,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:27:27,998 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328763178] [2021-05-06 10:27:27,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:27:28,003 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:27:28,003 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1393345178] [2021-05-06 10:27:28,004 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 [2021-05-06 10:27:28,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 10:27:28,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:27:28,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-06 10:27:28,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:27:28,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:28,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:28,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:28,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:28,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:28,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:28,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:28,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:28,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:28,201 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-06 10:27:28,201 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:27:28,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328763178] [2021-05-06 10:27:28,201 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:27:28,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393345178] [2021-05-06 10:27:28,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393345178] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:27:28,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:27:28,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 10:27:28,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817771939] [2021-05-06 10:27:28,202 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 10:27:28,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:27:28,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 10:27:28,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-05-06 10:27:28,202 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand has 11 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 10:27:28,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:27:28,334 INFO L93 Difference]: Finished difference Result 47 states and 50 transitions. [2021-05-06 10:27:28,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 10:27:28,335 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 34 [2021-05-06 10:27:28,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:27:28,335 INFO L225 Difference]: With dead ends: 47 [2021-05-06 10:27:28,335 INFO L226 Difference]: Without dead ends: 42 [2021-05-06 10:27:28,335 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 111.1ms TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-05-06 10:27:28,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-05-06 10:27:28,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-05-06 10:27:28,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 29 states have internal predecessors, (31), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 10:27:28,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2021-05-06 10:27:28,338 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 34 [2021-05-06 10:27:28,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:27:28,338 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2021-05-06 10:27:28,338 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 10:27:28,338 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2021-05-06 10:27:28,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-06 10:27:28,339 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:27:28,339 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:27:28,545 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-06 10:27:28,545 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:27:28,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:27:28,547 INFO L82 PathProgramCache]: Analyzing trace with hash 710880582, now seen corresponding path program 3 times [2021-05-06 10:27:28,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:27:28,548 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314013125] [2021-05-06 10:27:28,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:27:28,588 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:27:28,588 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1539860673] [2021-05-06 10:27:28,588 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:27:28,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 10:27:28,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:27:28,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 10:27:28,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:27:28,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:28,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:28,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:28,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:28,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:28,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:28,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:28,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:28,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:28,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:28,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:28,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:28,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:28,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:28,725 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 10:27:28,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:27:28,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314013125] [2021-05-06 10:27:28,725 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:27:28,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539860673] [2021-05-06 10:27:28,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539860673] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:27:28,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:27:28,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 10:27:28,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848158478] [2021-05-06 10:27:28,726 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 10:27:28,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:27:28,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 10:27:28,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-06 10:27:28,726 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 10:27:28,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:27:28,777 INFO L93 Difference]: Finished difference Result 44 states and 47 transitions. [2021-05-06 10:27:28,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 10:27:28,778 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 36 [2021-05-06 10:27:28,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:27:28,779 INFO L225 Difference]: With dead ends: 44 [2021-05-06 10:27:28,779 INFO L226 Difference]: Without dead ends: 44 [2021-05-06 10:27:28,779 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 37.8ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-05-06 10:27:28,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-06 10:27:28,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-05-06 10:27:28,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 30 states have (on average 1.1) internal successors, (33), 31 states have internal predecessors, (33), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 10:27:28,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2021-05-06 10:27:28,781 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 36 [2021-05-06 10:27:28,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:27:28,781 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2021-05-06 10:27:28,781 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 10:27:28,782 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2021-05-06 10:27:28,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-06 10:27:28,782 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:27:28,782 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:27:28,984 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:27:28,985 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:27:28,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:27:28,985 INFO L82 PathProgramCache]: Analyzing trace with hash 711953058, now seen corresponding path program 3 times [2021-05-06 10:27:28,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:27:28,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357404494] [2021-05-06 10:27:28,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:27:28,990 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:27:28,991 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [526142328] [2021-05-06 10:27:28,991 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 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 [2021-05-06 10:27:29,049 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-06 10:27:29,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:27:29,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 10:27:29,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:27:29,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:29,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:29,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:29,127 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-06 10:27:29,127 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:27:29,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357404494] [2021-05-06 10:27:29,127 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:27:29,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526142328] [2021-05-06 10:27:29,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526142328] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:27:29,127 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:27:29,127 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 10:27:29,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924845928] [2021-05-06 10:27:29,128 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 10:27:29,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:27:29,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 10:27:29,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-06 10:27:29,129 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 10:27:29,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:27:29,162 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2021-05-06 10:27:29,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 10:27:29,162 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 36 [2021-05-06 10:27:29,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:27:29,164 INFO L225 Difference]: With dead ends: 48 [2021-05-06 10:27:29,164 INFO L226 Difference]: Without dead ends: 45 [2021-05-06 10:27:29,164 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 34.8ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-06 10:27:29,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-06 10:27:29,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-05-06 10:27:29,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 32 states have (on average 1.0625) internal successors, (34), 32 states have internal predecessors, (34), 7 states have call successors, (7), 7 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 10:27:29,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2021-05-06 10:27:29,175 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 36 [2021-05-06 10:27:29,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:27:29,175 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2021-05-06 10:27:29,175 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 10:27:29,175 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2021-05-06 10:27:29,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-06 10:27:29,176 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:27:29,176 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:27:29,383 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:27:29,383 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:27:29,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:27:29,384 INFO L82 PathProgramCache]: Analyzing trace with hash 1474833412, now seen corresponding path program 3 times [2021-05-06 10:27:29,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:27:29,384 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070490431] [2021-05-06 10:27:29,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:27:29,389 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:27:29,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [636367081] [2021-05-06 10:27:29,389 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:27:29,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 10:27:29,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:27:29,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-06 10:27:29,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:27:29,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:29,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:29,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:29,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:29,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:29,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:29,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:29,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:29,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:29,582 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 8 proven. 24 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 10:27:29,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:27:29,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070490431] [2021-05-06 10:27:29,583 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:27:29,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636367081] [2021-05-06 10:27:29,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636367081] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:27:29,583 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:27:29,583 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 10:27:29,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526318723] [2021-05-06 10:27:29,583 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 10:27:29,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:27:29,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 10:27:29,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-05-06 10:27:29,584 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 10:27:29,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:27:29,639 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2021-05-06 10:27:29,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 10:27:29,640 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 42 [2021-05-06 10:27:29,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:27:29,640 INFO L225 Difference]: With dead ends: 50 [2021-05-06 10:27:29,640 INFO L226 Difference]: Without dead ends: 47 [2021-05-06 10:27:29,640 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 48.7ms TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-06 10:27:29,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-05-06 10:27:29,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-05-06 10:27:29,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 33 states have internal predecessors, (35), 8 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 10:27:29,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2021-05-06 10:27:29,642 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 42 [2021-05-06 10:27:29,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:27:29,643 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2021-05-06 10:27:29,643 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 10:27:29,643 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2021-05-06 10:27:29,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-06 10:27:29,643 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:27:29,643 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:27:29,848 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-06 10:27:29,849 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:27:29,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:27:29,849 INFO L82 PathProgramCache]: Analyzing trace with hash 831591399, now seen corresponding path program 4 times [2021-05-06 10:27:29,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:27:29,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16380509] [2021-05-06 10:27:29,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:27:29,854 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:27:29,854 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [513129375] [2021-05-06 10:27:29,854 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:27:29,918 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 10:27:29,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:27:29,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 10:27:29,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:27:29,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:29,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:29,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:29,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:29,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:29,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:29,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:29,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:29,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:29,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:29,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:29,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:29,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:29,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:29,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:29,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:29,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:30,021 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 10:27:30,022 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:27:30,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16380509] [2021-05-06 10:27:30,022 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:27:30,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513129375] [2021-05-06 10:27:30,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513129375] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:27:30,022 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:27:30,022 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 10:27:30,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508112860] [2021-05-06 10:27:30,022 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 10:27:30,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:27:30,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 10:27:30,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-06 10:27:30,023 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 7 states have call successors, (7), 7 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 10:27:30,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:27:30,073 INFO L93 Difference]: Finished difference Result 53 states and 54 transitions. [2021-05-06 10:27:30,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 10:27:30,073 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 7 states have call successors, (7), 7 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 44 [2021-05-06 10:27:30,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:27:30,073 INFO L225 Difference]: With dead ends: 53 [2021-05-06 10:27:30,073 INFO L226 Difference]: Without dead ends: 53 [2021-05-06 10:27:30,074 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 50.6ms TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-05-06 10:27:30,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-05-06 10:27:30,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-05-06 10:27:30,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 38 states have (on average 1.0526315789473684) internal successors, (40), 38 states have internal predecessors, (40), 8 states have call successors, (8), 8 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 10:27:30,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2021-05-06 10:27:30,077 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 44 [2021-05-06 10:27:30,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:27:30,077 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2021-05-06 10:27:30,078 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 7 states have call successors, (7), 7 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 10:27:30,078 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2021-05-06 10:27:30,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-06 10:27:30,080 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:27:30,080 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:27:30,288 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-06 10:27:30,288 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:27:30,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:27:30,289 INFO L82 PathProgramCache]: Analyzing trace with hash -1805593115, now seen corresponding path program 4 times [2021-05-06 10:27:30,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:27:30,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202620582] [2021-05-06 10:27:30,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:27:30,293 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:27:30,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1606751311] [2021-05-06 10:27:30,293 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 [2021-05-06 10:27:30,448 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 10:27:30,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:27:30,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-06 10:27:30,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:27:30,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:30,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:30,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:30,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:30,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:30,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:30,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:30,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:30,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:30,586 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 10 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-06 10:27:30,586 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:27:30,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202620582] [2021-05-06 10:27:30,586 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:27:30,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606751311] [2021-05-06 10:27:30,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606751311] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:27:30,586 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:27:30,586 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 10:27:30,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157321060] [2021-05-06 10:27:30,587 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 10:27:30,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:27:30,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 10:27:30,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-05-06 10:27:30,588 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 10:27:30,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:27:30,658 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2021-05-06 10:27:30,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 10:27:30,658 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 50 [2021-05-06 10:27:30,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:27:30,659 INFO L225 Difference]: With dead ends: 58 [2021-05-06 10:27:30,659 INFO L226 Difference]: Without dead ends: 55 [2021-05-06 10:27:30,659 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 60.4ms TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-05-06 10:27:30,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-06 10:27:30,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-05-06 10:27:30,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 39 states have internal predecessors, (41), 9 states have call successors, (9), 8 states have call predecessors, (9), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 10:27:30,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2021-05-06 10:27:30,668 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 50 [2021-05-06 10:27:30,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:27:30,668 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2021-05-06 10:27:30,668 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 10:27:30,668 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2021-05-06 10:27:30,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-06 10:27:30,669 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:27:30,669 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:27:30,872 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-06 10:27:30,873 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:27:30,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:27:30,873 INFO L82 PathProgramCache]: Analyzing trace with hash 847694216, now seen corresponding path program 5 times [2021-05-06 10:27:30,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:27:30,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159715321] [2021-05-06 10:27:30,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:27:30,880 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:27:30,880 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [602597514] [2021-05-06 10:27:30,880 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:27:30,947 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-06 10:27:30,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:27:30,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 10:27:30,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:27:30,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:30,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:30,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:30,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:30,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:30,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:30,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:30,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:30,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:30,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:30,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:30,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:31,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:31,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:31,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:31,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:31,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:31,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:31,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:31,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:31,063 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 10:27:31,063 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:27:31,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159715321] [2021-05-06 10:27:31,063 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:27:31,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602597514] [2021-05-06 10:27:31,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602597514] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:27:31,063 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:27:31,063 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 10:27:31,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129722429] [2021-05-06 10:27:31,064 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 10:27:31,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:27:31,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 10:27:31,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-06 10:27:31,064 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 8 states have call successors, (8), 8 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 10:27:31,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:27:31,126 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2021-05-06 10:27:31,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 10:27:31,127 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 8 states have call successors, (8), 8 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 52 [2021-05-06 10:27:31,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:27:31,127 INFO L225 Difference]: With dead ends: 61 [2021-05-06 10:27:31,127 INFO L226 Difference]: Without dead ends: 61 [2021-05-06 10:27:31,127 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 46.7ms TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-05-06 10:27:31,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-05-06 10:27:31,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2021-05-06 10:27:31,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 44 states have (on average 1.0454545454545454) internal successors, (46), 44 states have internal predecessors, (46), 9 states have call successors, (9), 9 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 10:27:31,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2021-05-06 10:27:31,129 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 52 [2021-05-06 10:27:31,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:27:31,129 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2021-05-06 10:27:31,129 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 8 states have call successors, (8), 8 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 10:27:31,129 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2021-05-06 10:27:31,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-05-06 10:27:31,130 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:27:31,130 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:27:31,344 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:27:31,345 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:27:31,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:27:31,345 INFO L82 PathProgramCache]: Analyzing trace with hash 1447431878, now seen corresponding path program 5 times [2021-05-06 10:27:31,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:27:31,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664541435] [2021-05-06 10:27:31,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:27:31,349 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:27:31,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1883568245] [2021-05-06 10:27:31,349 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 [2021-05-06 10:27:31,484 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-06 10:27:31,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:27:31,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-06 10:27:31,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:27:31,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:31,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:31,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:31,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:31,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:31,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:31,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:31,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:31,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:31,666 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 12 proven. 60 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-05-06 10:27:31,666 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:27:31,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664541435] [2021-05-06 10:27:31,666 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:27:31,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883568245] [2021-05-06 10:27:31,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883568245] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:27:31,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:27:31,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 10:27:31,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039346787] [2021-05-06 10:27:31,667 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 10:27:31,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:27:31,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 10:27:31,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-05-06 10:27:31,668 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand has 11 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 8 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 10:27:31,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:27:31,744 INFO L93 Difference]: Finished difference Result 66 states and 68 transitions. [2021-05-06 10:27:31,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 10:27:31,744 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 8 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 58 [2021-05-06 10:27:31,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:27:31,745 INFO L225 Difference]: With dead ends: 66 [2021-05-06 10:27:31,745 INFO L226 Difference]: Without dead ends: 63 [2021-05-06 10:27:31,745 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 79.7ms TimeCoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-05-06 10:27:31,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-05-06 10:27:31,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-05-06 10:27:31,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 45 states have (on average 1.0444444444444445) internal successors, (47), 45 states have internal predecessors, (47), 10 states have call successors, (10), 9 states have call predecessors, (10), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 10:27:31,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2021-05-06 10:27:31,747 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 58 [2021-05-06 10:27:31,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:27:31,747 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2021-05-06 10:27:31,747 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 8 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 10:27:31,747 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2021-05-06 10:27:31,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-05-06 10:27:31,747 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:27:31,747 INFO L523 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:27:31,968 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:27:31,968 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:27:31,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:27:31,968 INFO L82 PathProgramCache]: Analyzing trace with hash 268521001, now seen corresponding path program 6 times [2021-05-06 10:27:31,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:27:31,968 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81308018] [2021-05-06 10:27:31,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:27:31,977 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:27:31,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1072276973] [2021-05-06 10:27:31,977 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 [2021-05-06 10:27:32,039 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-06 10:27:32,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:27:32,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-06 10:27:32,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:27:32,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:32,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:32,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:32,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:32,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:32,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:32,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:32,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:32,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:32,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:32,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:32,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:32,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:32,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:32,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:32,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:32,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:32,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:32,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:32,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:32,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:32,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:32,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:32,143 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 10:27:32,144 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:27:32,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81308018] [2021-05-06 10:27:32,144 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:27:32,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072276973] [2021-05-06 10:27:32,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072276973] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:27:32,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:27:32,144 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 10:27:32,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682804838] [2021-05-06 10:27:32,144 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 10:27:32,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:27:32,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 10:27:32,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-06 10:27:32,145 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 9 states have call successors, (9), 9 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 10:27:32,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:27:32,234 INFO L93 Difference]: Finished difference Result 69 states and 70 transitions. [2021-05-06 10:27:32,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-06 10:27:32,235 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 9 states have call successors, (9), 9 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 60 [2021-05-06 10:27:32,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:27:32,235 INFO L225 Difference]: With dead ends: 69 [2021-05-06 10:27:32,235 INFO L226 Difference]: Without dead ends: 69 [2021-05-06 10:27:32,236 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 57.4ms TimeCoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2021-05-06 10:27:32,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-05-06 10:27:32,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-05-06 10:27:32,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 50 states have (on average 1.04) internal successors, (52), 50 states have internal predecessors, (52), 10 states have call successors, (10), 10 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 10:27:32,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2021-05-06 10:27:32,239 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 60 [2021-05-06 10:27:32,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:27:32,239 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2021-05-06 10:27:32,239 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 9 states have call successors, (9), 9 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 10:27:32,239 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2021-05-06 10:27:32,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-05-06 10:27:32,239 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:27:32,239 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:27:32,448 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:27:32,449 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:27:32,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:27:32,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1416046937, now seen corresponding path program 6 times [2021-05-06 10:27:32,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:27:32,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011681109] [2021-05-06 10:27:32,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:27:32,453 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:27:32,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [413868337] [2021-05-06 10:27:32,453 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:27:32,629 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-06 10:27:32,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:27:32,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-06 10:27:32,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:27:32,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:32,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:32,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:32,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:32,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:32,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:32,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:32,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:32,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:32,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:32,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:32,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:32,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:32,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:32,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:32,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:32,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:32,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:32,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:32,808 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 14 proven. 84 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-05-06 10:27:32,808 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:27:32,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011681109] [2021-05-06 10:27:32,808 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:27:32,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413868337] [2021-05-06 10:27:32,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413868337] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:27:32,808 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:27:32,808 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 10:27:32,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166659523] [2021-05-06 10:27:32,810 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 10:27:32,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:27:32,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 10:27:32,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-05-06 10:27:32,810 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 9 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 10:27:32,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:27:32,926 INFO L93 Difference]: Finished difference Result 74 states and 76 transitions. [2021-05-06 10:27:32,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 10:27:32,926 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 9 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 66 [2021-05-06 10:27:32,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:27:32,927 INFO L225 Difference]: With dead ends: 74 [2021-05-06 10:27:32,927 INFO L226 Difference]: Without dead ends: 71 [2021-05-06 10:27:32,927 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 82.2ms TimeCoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-05-06 10:27:32,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-05-06 10:27:32,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2021-05-06 10:27:32,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 51 states have (on average 1.0392156862745099) internal successors, (53), 51 states have internal predecessors, (53), 11 states have call successors, (11), 10 states have call predecessors, (11), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 10:27:32,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2021-05-06 10:27:32,933 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 66 [2021-05-06 10:27:32,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:27:32,933 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2021-05-06 10:27:32,933 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 9 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 10:27:32,933 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2021-05-06 10:27:32,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-06 10:27:32,934 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:27:32,934 INFO L523 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:27:33,142 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-05-06 10:27:33,142 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:27:33,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:27:33,142 INFO L82 PathProgramCache]: Analyzing trace with hash 1539416522, now seen corresponding path program 7 times [2021-05-06 10:27:33,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:27:33,143 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084365027] [2021-05-06 10:27:33,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:27:33,149 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:27:33,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1469881956] [2021-05-06 10:27:33,149 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:27:33,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:27:33,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 10:27:33,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:27:33,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:33,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:33,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:33,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:33,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:33,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:33,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:33,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:33,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:33,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:33,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:33,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:33,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:33,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:33,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:33,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:33,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:33,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:33,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:33,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:33,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:33,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:33,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:33,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:33,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:33,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:33,337 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 14 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 10:27:33,337 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:27:33,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084365027] [2021-05-06 10:27:33,337 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:27:33,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469881956] [2021-05-06 10:27:33,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469881956] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:27:33,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:27:33,337 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 10:27:33,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900925336] [2021-05-06 10:27:33,338 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 10:27:33,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:27:33,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 10:27:33,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-05-06 10:27:33,339 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 10 states have call successors, (10), 10 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 10:27:33,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:27:33,435 INFO L93 Difference]: Finished difference Result 77 states and 78 transitions. [2021-05-06 10:27:33,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-06 10:27:33,435 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 10 states have call successors, (10), 10 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 68 [2021-05-06 10:27:33,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:27:33,436 INFO L225 Difference]: With dead ends: 77 [2021-05-06 10:27:33,436 INFO L226 Difference]: Without dead ends: 77 [2021-05-06 10:27:33,436 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 72.1ms TimeCoverageRelationStatistics Valid=117, Invalid=189, Unknown=0, NotChecked=0, Total=306 [2021-05-06 10:27:33,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-05-06 10:27:33,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2021-05-06 10:27:33,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 56 states have (on average 1.0357142857142858) internal successors, (58), 56 states have internal predecessors, (58), 11 states have call successors, (11), 11 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 10:27:33,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2021-05-06 10:27:33,438 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 68 [2021-05-06 10:27:33,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:27:33,438 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2021-05-06 10:27:33,438 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 10 states have call successors, (10), 10 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 10:27:33,438 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2021-05-06 10:27:33,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-05-06 10:27:33,439 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:27:33,439 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:27:33,652 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-05-06 10:27:33,653 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:27:33,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:27:33,653 INFO L82 PathProgramCache]: Analyzing trace with hash 291122568, now seen corresponding path program 7 times [2021-05-06 10:27:33,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:27:33,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312800133] [2021-05-06 10:27:33,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:27:33,657 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:27:33,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [283807713] [2021-05-06 10:27:33,657 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:27:33,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:27:33,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-06 10:27:33,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:27:34,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:34,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:34,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:34,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:34,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:34,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:34,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:34,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:34,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:34,164 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 16 proven. 112 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-05-06 10:27:34,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:27:34,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312800133] [2021-05-06 10:27:34,164 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:27:34,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283807713] [2021-05-06 10:27:34,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283807713] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:27:34,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:27:34,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 10:27:34,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058908547] [2021-05-06 10:27:34,165 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 10:27:34,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:27:34,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 10:27:34,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2021-05-06 10:27:34,165 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand has 13 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 10 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 10:27:34,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:27:34,301 INFO L93 Difference]: Finished difference Result 82 states and 84 transitions. [2021-05-06 10:27:34,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 10:27:34,302 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 10 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 74 [2021-05-06 10:27:34,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:27:34,302 INFO L225 Difference]: With dead ends: 82 [2021-05-06 10:27:34,302 INFO L226 Difference]: Without dead ends: 79 [2021-05-06 10:27:34,303 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 86.5ms TimeCoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-05-06 10:27:34,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-05-06 10:27:34,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2021-05-06 10:27:34,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 57 states have (on average 1.0350877192982457) internal successors, (59), 57 states have internal predecessors, (59), 12 states have call successors, (12), 11 states have call predecessors, (12), 9 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 10:27:34,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 81 transitions. [2021-05-06 10:27:34,305 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 81 transitions. Word has length 74 [2021-05-06 10:27:34,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:27:34,305 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 81 transitions. [2021-05-06 10:27:34,306 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 10 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 10:27:34,306 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 81 transitions. [2021-05-06 10:27:34,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-05-06 10:27:34,306 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:27:34,306 INFO L523 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:27:34,506 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-05-06 10:27:34,507 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:27:34,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:27:34,507 INFO L82 PathProgramCache]: Analyzing trace with hash 1451803755, now seen corresponding path program 8 times [2021-05-06 10:27:34,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:27:34,507 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716104670] [2021-05-06 10:27:34,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:27:34,512 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:27:34,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1762527179] [2021-05-06 10:27:34,512 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:27:34,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 10:27:34,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:27:34,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-06 10:27:34,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:27:34,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:34,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:34,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:34,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:34,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:34,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:34,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:34,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:34,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:34,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:34,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:34,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:34,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:34,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:34,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:34,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:34,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:34,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:34,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:34,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:34,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:34,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:34,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:34,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:34,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:34,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:34,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:34,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:34,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:34,726 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 16 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 10:27:34,726 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:27:34,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716104670] [2021-05-06 10:27:34,727 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:27:34,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762527179] [2021-05-06 10:27:34,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762527179] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:27:34,727 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:27:34,727 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 10:27:34,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095996333] [2021-05-06 10:27:34,727 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 10:27:34,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:27:34,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 10:27:34,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-05-06 10:27:34,728 INFO L87 Difference]: Start difference. First operand 79 states and 81 transitions. Second operand has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 11 states have call successors, (11), 11 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 10:27:34,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:27:34,856 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2021-05-06 10:27:34,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-06 10:27:34,857 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 11 states have call successors, (11), 11 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 76 [2021-05-06 10:27:34,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:27:34,857 INFO L225 Difference]: With dead ends: 85 [2021-05-06 10:27:34,857 INFO L226 Difference]: Without dead ends: 85 [2021-05-06 10:27:34,858 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 90.1ms TimeCoverageRelationStatistics Valid=145, Invalid=235, Unknown=0, NotChecked=0, Total=380 [2021-05-06 10:27:34,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-05-06 10:27:34,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2021-05-06 10:27:34,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 62 states have (on average 1.032258064516129) internal successors, (64), 62 states have internal predecessors, (64), 12 states have call successors, (12), 12 states have call predecessors, (12), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 10:27:34,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2021-05-06 10:27:34,859 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 76 [2021-05-06 10:27:34,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:27:34,860 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2021-05-06 10:27:34,860 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 11 states have call successors, (11), 11 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 10:27:34,860 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2021-05-06 10:27:34,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-05-06 10:27:34,860 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:27:34,860 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:27:35,069 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-06 10:27:35,069 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:27:35,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:27:35,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1938494313, now seen corresponding path program 8 times [2021-05-06 10:27:35,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:27:35,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63695767] [2021-05-06 10:27:35,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:27:35,073 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:27:35,074 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [369710477] [2021-05-06 10:27:35,074 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:27:35,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 10:27:35,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:27:35,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-06 10:27:35,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:27:35,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:35,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:35,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:35,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:35,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:35,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:35,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:35,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:35,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:35,786 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 18 proven. 144 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-05-06 10:27:35,787 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:27:35,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63695767] [2021-05-06 10:27:35,787 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:27:35,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369710477] [2021-05-06 10:27:35,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369710477] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:27:35,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:27:35,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-06 10:27:35,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291506319] [2021-05-06 10:27:35,787 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-06 10:27:35,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:27:35,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-06 10:27:35,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2021-05-06 10:27:35,788 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand has 14 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 11 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 10:27:35,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:27:35,949 INFO L93 Difference]: Finished difference Result 90 states and 92 transitions. [2021-05-06 10:27:35,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 10:27:35,949 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 11 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 82 [2021-05-06 10:27:35,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:27:35,950 INFO L225 Difference]: With dead ends: 90 [2021-05-06 10:27:35,950 INFO L226 Difference]: Without dead ends: 87 [2021-05-06 10:27:35,950 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 99.4ms TimeCoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-05-06 10:27:35,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-05-06 10:27:35,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2021-05-06 10:27:35,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 63 states have (on average 1.0317460317460319) internal successors, (65), 63 states have internal predecessors, (65), 13 states have call successors, (13), 12 states have call predecessors, (13), 10 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 10:27:35,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 89 transitions. [2021-05-06 10:27:35,952 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 89 transitions. Word has length 82 [2021-05-06 10:27:35,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:27:35,952 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 89 transitions. [2021-05-06 10:27:35,953 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 11 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 10:27:35,953 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 89 transitions. [2021-05-06 10:27:35,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-05-06 10:27:35,953 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:27:35,953 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:27:36,153 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-06 10:27:36,154 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:27:36,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:27:36,154 INFO L82 PathProgramCache]: Analyzing trace with hash -266881524, now seen corresponding path program 9 times [2021-05-06 10:27:36,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:27:36,154 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584207380] [2021-05-06 10:27:36,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:27:36,158 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:27:36,158 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [911510220] [2021-05-06 10:27:36,158 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:27:36,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-05-06 10:27:36,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:27:36,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-06 10:27:36,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:27:36,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:36,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:36,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:36,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:36,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:36,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:36,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:36,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:36,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:36,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:36,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:36,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:36,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:36,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:36,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:36,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:36,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:36,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:36,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:36,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:36,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:36,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:36,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:36,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:36,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:36,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:36,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:36,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:36,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:36,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:36,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:36,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:36,460 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 18 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 10:27:36,460 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:27:36,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584207380] [2021-05-06 10:27:36,460 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:27:36,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911510220] [2021-05-06 10:27:36,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911510220] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:27:36,460 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:27:36,460 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 10:27:36,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975981780] [2021-05-06 10:27:36,460 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 10:27:36,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:27:36,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 10:27:36,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-05-06 10:27:36,461 INFO L87 Difference]: Start difference. First operand 87 states and 89 transitions. Second operand has 13 states, 13 states have (on average 4.769230769230769) internal successors, (62), 12 states have internal predecessors, (62), 12 states have call successors, (12), 12 states have call predecessors, (12), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 10:27:36,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:27:36,589 INFO L93 Difference]: Finished difference Result 93 states and 94 transitions. [2021-05-06 10:27:36,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-06 10:27:36,589 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.769230769230769) internal successors, (62), 12 states have internal predecessors, (62), 12 states have call successors, (12), 12 states have call predecessors, (12), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 84 [2021-05-06 10:27:36,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:27:36,590 INFO L225 Difference]: With dead ends: 93 [2021-05-06 10:27:36,590 INFO L226 Difference]: Without dead ends: 93 [2021-05-06 10:27:36,590 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 118.3ms TimeCoverageRelationStatistics Valid=176, Invalid=286, Unknown=0, NotChecked=0, Total=462 [2021-05-06 10:27:36,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-05-06 10:27:36,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2021-05-06 10:27:36,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 68 states have (on average 1.0294117647058822) internal successors, (70), 68 states have internal predecessors, (70), 13 states have call successors, (13), 13 states have call predecessors, (13), 11 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 10:27:36,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2021-05-06 10:27:36,592 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 84 [2021-05-06 10:27:36,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:27:36,592 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2021-05-06 10:27:36,592 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.769230769230769) internal successors, (62), 12 states have internal predecessors, (62), 12 states have call successors, (12), 12 states have call predecessors, (12), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 10:27:36,592 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2021-05-06 10:27:36,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-05-06 10:27:36,592 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:27:36,593 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:27:36,797 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:27:36,797 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:27:36,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:27:36,797 INFO L82 PathProgramCache]: Analyzing trace with hash 757893194, now seen corresponding path program 9 times [2021-05-06 10:27:36,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:27:36,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348324206] [2021-05-06 10:27:36,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:27:36,801 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:27:36,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1581781931] [2021-05-06 10:27:36,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:27:37,292 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-05-06 10:27:37,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:27:37,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-06 10:27:37,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:27:37,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:37,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:37,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:37,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:37,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:37,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:37,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:37,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:37,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:37,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:37,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:37,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:37,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:37,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:37,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:37,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:37,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:37,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:37,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:37,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:37,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:37,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:37,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:37,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:37,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:37,543 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 20 proven. 180 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-05-06 10:27:37,543 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:27:37,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348324206] [2021-05-06 10:27:37,543 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:27:37,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581781931] [2021-05-06 10:27:37,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581781931] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:27:37,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:27:37,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-06 10:27:37,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443867059] [2021-05-06 10:27:37,544 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-06 10:27:37,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:27:37,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-06 10:27:37,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2021-05-06 10:27:37,544 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand has 15 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 12 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 10:27:37,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:27:37,742 INFO L93 Difference]: Finished difference Result 98 states and 100 transitions. [2021-05-06 10:27:37,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-06 10:27:37,742 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 12 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Word has length 90 [2021-05-06 10:27:37,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:27:37,743 INFO L225 Difference]: With dead ends: 98 [2021-05-06 10:27:37,743 INFO L226 Difference]: Without dead ends: 95 [2021-05-06 10:27:37,743 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 132.4ms TimeCoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2021-05-06 10:27:37,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-05-06 10:27:37,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2021-05-06 10:27:37,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 69 states have (on average 1.0289855072463767) internal successors, (71), 69 states have internal predecessors, (71), 14 states have call successors, (14), 13 states have call predecessors, (14), 11 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-06 10:27:37,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 97 transitions. [2021-05-06 10:27:37,745 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 97 transitions. Word has length 90 [2021-05-06 10:27:37,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:27:37,745 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 97 transitions. [2021-05-06 10:27:37,746 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 12 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 10:27:37,746 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 97 transitions. [2021-05-06 10:27:37,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-05-06 10:27:37,746 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:27:37,746 INFO L523 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:27:37,952 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-05-06 10:27:37,952 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:27:37,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:27:37,952 INFO L82 PathProgramCache]: Analyzing trace with hash -953190739, now seen corresponding path program 10 times [2021-05-06 10:27:37,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:27:37,952 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931670923] [2021-05-06 10:27:37,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:27:37,958 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:27:37,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1053756011] [2021-05-06 10:27:37,959 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:27:38,416 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 10:27:38,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:27:38,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-06 10:27:38,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:27:38,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:38,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:38,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:38,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:38,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:38,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:38,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:38,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:38,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:38,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:38,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:38,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:38,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:38,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:38,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:38,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:38,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:38,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:38,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:38,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:38,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:38,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:38,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:38,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:38,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:38,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:38,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:38,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:38,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:38,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:38,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:38,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:38,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:38,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:38,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:38,605 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 20 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 10:27:38,606 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:27:38,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931670923] [2021-05-06 10:27:38,606 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:27:38,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053756011] [2021-05-06 10:27:38,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053756011] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:27:38,606 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:27:38,606 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-06 10:27:38,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051819566] [2021-05-06 10:27:38,606 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-06 10:27:38,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:27:38,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-06 10:27:38,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-05-06 10:27:38,607 INFO L87 Difference]: Start difference. First operand 95 states and 97 transitions. Second operand has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 13 states have internal predecessors, (68), 13 states have call successors, (13), 13 states have call predecessors, (13), 11 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 10:27:38,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:27:38,744 INFO L93 Difference]: Finished difference Result 101 states and 102 transitions. [2021-05-06 10:27:38,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-06 10:27:38,745 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 13 states have internal predecessors, (68), 13 states have call successors, (13), 13 states have call predecessors, (13), 11 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Word has length 92 [2021-05-06 10:27:38,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:27:38,745 INFO L225 Difference]: With dead ends: 101 [2021-05-06 10:27:38,745 INFO L226 Difference]: Without dead ends: 101 [2021-05-06 10:27:38,746 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 126.3ms TimeCoverageRelationStatistics Valid=210, Invalid=342, Unknown=0, NotChecked=0, Total=552 [2021-05-06 10:27:38,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-05-06 10:27:38,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2021-05-06 10:27:38,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 74 states have (on average 1.027027027027027) internal successors, (76), 74 states have internal predecessors, (76), 14 states have call successors, (14), 14 states have call predecessors, (14), 12 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-06 10:27:38,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2021-05-06 10:27:38,748 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 92 [2021-05-06 10:27:38,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:27:38,748 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2021-05-06 10:27:38,748 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 13 states have internal predecessors, (68), 13 states have call successors, (13), 13 states have call predecessors, (13), 11 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 10:27:38,748 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2021-05-06 10:27:38,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-05-06 10:27:38,748 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:27:38,748 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:27:38,949 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:27:38,949 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:27:38,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:27:38,949 INFO L82 PathProgramCache]: Analyzing trace with hash 138382379, now seen corresponding path program 10 times [2021-05-06 10:27:38,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:27:38,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445221901] [2021-05-06 10:27:38,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:27:38,953 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:27:38,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1644211854] [2021-05-06 10:27:38,953 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:27:39,768 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 10:27:39,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:27:39,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 48 conjunts are in the unsatisfiable core [2021-05-06 10:27:39,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:27:39,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:39,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:39,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:39,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:39,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:39,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:39,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:39,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:39,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:40,008 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 22 proven. 220 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2021-05-06 10:27:40,008 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:27:40,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445221901] [2021-05-06 10:27:40,008 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:27:40,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644211854] [2021-05-06 10:27:40,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644211854] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:27:40,015 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:27:40,015 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-06 10:27:40,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026974848] [2021-05-06 10:27:40,015 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-06 10:27:40,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:27:40,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-06 10:27:40,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2021-05-06 10:27:40,018 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand has 16 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 13 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-06 10:27:40,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:27:40,212 INFO L93 Difference]: Finished difference Result 106 states and 108 transitions. [2021-05-06 10:27:40,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-06 10:27:40,213 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 13 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Word has length 98 [2021-05-06 10:27:40,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:27:40,213 INFO L225 Difference]: With dead ends: 106 [2021-05-06 10:27:40,213 INFO L226 Difference]: Without dead ends: 103 [2021-05-06 10:27:40,213 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 127.4ms TimeCoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2021-05-06 10:27:40,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-05-06 10:27:40,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2021-05-06 10:27:40,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 75 states have (on average 1.0266666666666666) internal successors, (77), 75 states have internal predecessors, (77), 15 states have call successors, (15), 14 states have call predecessors, (15), 12 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 10:27:40,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 105 transitions. [2021-05-06 10:27:40,215 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 105 transitions. Word has length 98 [2021-05-06 10:27:40,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:27:40,216 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 105 transitions. [2021-05-06 10:27:40,216 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 13 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-06 10:27:40,216 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 105 transitions. [2021-05-06 10:27:40,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-05-06 10:27:40,216 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:27:40,216 INFO L523 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:27:40,420 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-05-06 10:27:40,421 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:27:40,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:27:40,421 INFO L82 PathProgramCache]: Analyzing trace with hash 697370190, now seen corresponding path program 11 times [2021-05-06 10:27:40,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:27:40,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802259888] [2021-05-06 10:27:40,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:27:40,425 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:27:40,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1641360391] [2021-05-06 10:27:40,425 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:27:40,810 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-05-06 10:27:40,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:27:40,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-06 10:27:40,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:27:40,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:40,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:40,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:40,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:40,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:40,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:40,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:40,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:40,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:40,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:40,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:40,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:40,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:40,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:40,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:40,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:40,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:40,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:40,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:40,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:40,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:40,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:40,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:40,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:40,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:40,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:40,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:40,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:40,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:40,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:40,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:40,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:40,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:40,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:40,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:40,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:40,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:40,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:41,007 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 22 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 10:27:41,008 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:27:41,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802259888] [2021-05-06 10:27:41,008 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:27:41,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641360391] [2021-05-06 10:27:41,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641360391] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:27:41,008 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:27:41,008 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-06 10:27:41,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640175022] [2021-05-06 10:27:41,008 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-06 10:27:41,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:27:41,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-06 10:27:41,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2021-05-06 10:27:41,009 INFO L87 Difference]: Start difference. First operand 103 states and 105 transitions. Second operand has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 14 states have internal predecessors, (74), 14 states have call successors, (14), 14 states have call predecessors, (14), 12 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-06 10:27:41,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:27:41,148 INFO L93 Difference]: Finished difference Result 109 states and 110 transitions. [2021-05-06 10:27:41,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-06 10:27:41,149 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 14 states have internal predecessors, (74), 14 states have call successors, (14), 14 states have call predecessors, (14), 12 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Word has length 100 [2021-05-06 10:27:41,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:27:41,149 INFO L225 Difference]: With dead ends: 109 [2021-05-06 10:27:41,149 INFO L226 Difference]: Without dead ends: 109 [2021-05-06 10:27:41,150 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 140.6ms TimeCoverageRelationStatistics Valid=247, Invalid=403, Unknown=0, NotChecked=0, Total=650 [2021-05-06 10:27:41,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-05-06 10:27:41,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2021-05-06 10:27:41,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 80 states have (on average 1.025) internal successors, (82), 80 states have internal predecessors, (82), 15 states have call successors, (15), 15 states have call predecessors, (15), 13 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 10:27:41,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2021-05-06 10:27:41,152 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 100 [2021-05-06 10:27:41,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:27:41,152 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2021-05-06 10:27:41,152 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 14 states have internal predecessors, (74), 14 states have call successors, (14), 14 states have call predecessors, (14), 12 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-06 10:27:41,152 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2021-05-06 10:27:41,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-05-06 10:27:41,152 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:27:41,153 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:27:41,353 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-05-06 10:27:41,353 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:27:41,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:27:41,353 INFO L82 PathProgramCache]: Analyzing trace with hash 1036328716, now seen corresponding path program 11 times [2021-05-06 10:27:41,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:27:41,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37990538] [2021-05-06 10:27:41,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:27:41,357 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:27:41,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [450880139] [2021-05-06 10:27:41,357 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:27:41,756 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-05-06 10:27:41,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:27:41,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 52 conjunts are in the unsatisfiable core [2021-05-06 10:27:41,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:27:41,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:41,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:41,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:41,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:41,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:41,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:41,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:41,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:41,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:42,009 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 24 proven. 264 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2021-05-06 10:27:42,009 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:27:42,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37990538] [2021-05-06 10:27:42,009 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:27:42,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450880139] [2021-05-06 10:27:42,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450880139] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:27:42,009 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:27:42,009 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-06 10:27:42,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409832565] [2021-05-06 10:27:42,009 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-06 10:27:42,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:27:42,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-06 10:27:42,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2021-05-06 10:27:42,010 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand has 17 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 14 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 10:27:42,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:27:42,248 INFO L93 Difference]: Finished difference Result 114 states and 116 transitions. [2021-05-06 10:27:42,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-06 10:27:42,248 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 14 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Word has length 106 [2021-05-06 10:27:42,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:27:42,249 INFO L225 Difference]: With dead ends: 114 [2021-05-06 10:27:42,249 INFO L226 Difference]: Without dead ends: 111 [2021-05-06 10:27:42,249 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 136.8ms TimeCoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-05-06 10:27:42,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-05-06 10:27:42,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2021-05-06 10:27:42,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 81 states have (on average 1.0246913580246915) internal successors, (83), 81 states have internal predecessors, (83), 16 states have call successors, (16), 15 states have call predecessors, (16), 13 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-06 10:27:42,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 113 transitions. [2021-05-06 10:27:42,251 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 113 transitions. Word has length 106 [2021-05-06 10:27:42,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:27:42,251 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 113 transitions. [2021-05-06 10:27:42,251 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 14 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 10:27:42,251 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 113 transitions. [2021-05-06 10:27:42,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-05-06 10:27:42,252 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:27:42,252 INFO L523 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:27:42,457 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-05-06 10:27:42,457 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:27:42,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:27:42,457 INFO L82 PathProgramCache]: Analyzing trace with hash 335373551, now seen corresponding path program 12 times [2021-05-06 10:27:42,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:27:42,458 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127003343] [2021-05-06 10:27:42,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:27:42,461 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:27:42,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [473742828] [2021-05-06 10:27:42,461 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:27:42,643 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-05-06 10:27:42,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:27:42,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-06 10:27:42,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:27:42,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:42,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:42,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:42,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:42,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:42,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:42,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:42,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:42,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:42,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:42,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:42,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:42,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:42,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:42,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:42,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:42,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:42,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:42,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:42,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:42,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:42,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:42,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:42,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:42,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:42,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:42,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:42,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:42,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:42,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:42,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:42,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:42,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:42,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:42,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:42,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:42,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:42,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:42,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:42,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:42,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:42,857 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 24 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 10:27:42,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:27:42,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127003343] [2021-05-06 10:27:42,858 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:27:42,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473742828] [2021-05-06 10:27:42,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473742828] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:27:42,858 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:27:42,858 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-06 10:27:42,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194757008] [2021-05-06 10:27:42,858 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-06 10:27:42,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:27:42,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-06 10:27:42,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2021-05-06 10:27:42,858 INFO L87 Difference]: Start difference. First operand 111 states and 113 transitions. Second operand has 16 states, 16 states have (on average 5.0) internal successors, (80), 15 states have internal predecessors, (80), 15 states have call successors, (15), 15 states have call predecessors, (15), 13 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 10:27:43,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:27:43,019 INFO L93 Difference]: Finished difference Result 117 states and 118 transitions. [2021-05-06 10:27:43,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-06 10:27:43,020 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.0) internal successors, (80), 15 states have internal predecessors, (80), 15 states have call successors, (15), 15 states have call predecessors, (15), 13 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Word has length 108 [2021-05-06 10:27:43,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:27:43,020 INFO L225 Difference]: With dead ends: 117 [2021-05-06 10:27:43,020 INFO L226 Difference]: Without dead ends: 117 [2021-05-06 10:27:43,020 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 163.8ms TimeCoverageRelationStatistics Valid=287, Invalid=469, Unknown=0, NotChecked=0, Total=756 [2021-05-06 10:27:43,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-05-06 10:27:43,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2021-05-06 10:27:43,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 86 states have (on average 1.0232558139534884) internal successors, (88), 86 states have internal predecessors, (88), 16 states have call successors, (16), 16 states have call predecessors, (16), 14 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-06 10:27:43,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2021-05-06 10:27:43,022 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 108 [2021-05-06 10:27:43,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:27:43,023 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2021-05-06 10:27:43,023 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.0) internal successors, (80), 15 states have internal predecessors, (80), 15 states have call successors, (15), 15 states have call predecessors, (15), 13 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 10:27:43,023 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2021-05-06 10:27:43,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-05-06 10:27:43,023 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:27:43,023 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:27:43,227 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-05-06 10:27:43,228 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:27:43,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:27:43,228 INFO L82 PathProgramCache]: Analyzing trace with hash 1975402733, now seen corresponding path program 12 times [2021-05-06 10:27:43,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:27:43,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654069391] [2021-05-06 10:27:43,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:27:43,232 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:27:43,232 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [11576164] [2021-05-06 10:27:43,232 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:27:43,806 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-05-06 10:27:43,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:27:43,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 57 conjunts are in the unsatisfiable core [2021-05-06 10:27:43,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:27:43,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:43,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:43,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:43,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:43,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:43,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:43,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:43,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:43,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:43,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:44,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:44,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:44,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:44,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:44,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:44,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:44,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:44,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:44,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:44,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:44,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:44,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:44,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:44,114 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 26 proven. 312 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2021-05-06 10:27:44,114 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:27:44,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654069391] [2021-05-06 10:27:44,114 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:27:44,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11576164] [2021-05-06 10:27:44,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11576164] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:27:44,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:27:44,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-05-06 10:27:44,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14184651] [2021-05-06 10:27:44,114 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-06 10:27:44,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:27:44,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-06 10:27:44,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2021-05-06 10:27:44,115 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand has 18 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 15 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-06 10:27:44,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:27:44,393 INFO L93 Difference]: Finished difference Result 122 states and 124 transitions. [2021-05-06 10:27:44,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-06 10:27:44,394 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 15 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Word has length 114 [2021-05-06 10:27:44,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:27:44,394 INFO L225 Difference]: With dead ends: 122 [2021-05-06 10:27:44,394 INFO L226 Difference]: Without dead ends: 119 [2021-05-06 10:27:44,395 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 162.4ms TimeCoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-05-06 10:27:44,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-05-06 10:27:44,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2021-05-06 10:27:44,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 87 states have (on average 1.0229885057471264) internal successors, (89), 87 states have internal predecessors, (89), 17 states have call successors, (17), 16 states have call predecessors, (17), 14 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-06 10:27:44,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 121 transitions. [2021-05-06 10:27:44,397 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 121 transitions. Word has length 114 [2021-05-06 10:27:44,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:27:44,397 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 121 transitions. [2021-05-06 10:27:44,397 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 15 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-06 10:27:44,397 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 121 transitions. [2021-05-06 10:27:44,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-05-06 10:27:44,397 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:27:44,398 INFO L523 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:27:44,604 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-05-06 10:27:44,605 INFO L428 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:27:44,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:27:44,605 INFO L82 PathProgramCache]: Analyzing trace with hash 842371728, now seen corresponding path program 13 times [2021-05-06 10:27:44,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:27:44,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474047845] [2021-05-06 10:27:44,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:27:44,609 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:27:44,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1091157387] [2021-05-06 10:27:44,609 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:27:44,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:27:44,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-06 10:27:44,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:27:44,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:44,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:44,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:44,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:44,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:44,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:44,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:44,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:44,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:44,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:44,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:44,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:44,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:44,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:44,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:44,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:44,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:44,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:44,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:44,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:44,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:44,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:44,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:44,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:44,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:44,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:44,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:44,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:44,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:44,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:44,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:44,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:44,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:44,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:44,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:44,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:44,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:44,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:44,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:44,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:44,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:44,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:44,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:44,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:44,899 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 26 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 10:27:44,899 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:27:44,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474047845] [2021-05-06 10:27:44,899 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:27:44,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091157387] [2021-05-06 10:27:44,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091157387] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:27:44,899 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:27:44,899 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-06 10:27:44,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979568566] [2021-05-06 10:27:44,899 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-06 10:27:44,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:27:44,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-06 10:27:44,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2021-05-06 10:27:44,900 INFO L87 Difference]: Start difference. First operand 119 states and 121 transitions. Second operand has 17 states, 17 states have (on average 5.0588235294117645) internal successors, (86), 16 states have internal predecessors, (86), 16 states have call successors, (16), 16 states have call predecessors, (16), 14 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-06 10:27:45,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:27:45,074 INFO L93 Difference]: Finished difference Result 125 states and 126 transitions. [2021-05-06 10:27:45,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-06 10:27:45,075 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.0588235294117645) internal successors, (86), 16 states have internal predecessors, (86), 16 states have call successors, (16), 16 states have call predecessors, (16), 14 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Word has length 116 [2021-05-06 10:27:45,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:27:45,075 INFO L225 Difference]: With dead ends: 125 [2021-05-06 10:27:45,075 INFO L226 Difference]: Without dead ends: 125 [2021-05-06 10:27:45,076 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 188.7ms TimeCoverageRelationStatistics Valid=330, Invalid=540, Unknown=0, NotChecked=0, Total=870 [2021-05-06 10:27:45,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-05-06 10:27:45,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2021-05-06 10:27:45,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 92 states have (on average 1.0217391304347827) internal successors, (94), 92 states have internal predecessors, (94), 17 states have call successors, (17), 17 states have call predecessors, (17), 15 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-06 10:27:45,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 126 transitions. [2021-05-06 10:27:45,078 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 126 transitions. Word has length 116 [2021-05-06 10:27:45,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:27:45,078 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 126 transitions. [2021-05-06 10:27:45,078 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.0588235294117645) internal successors, (86), 16 states have internal predecessors, (86), 16 states have call successors, (16), 16 states have call predecessors, (16), 14 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-06 10:27:45,078 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 126 transitions. [2021-05-06 10:27:45,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-05-06 10:27:45,079 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:27:45,079 INFO L523 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:27:45,292 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:27:45,293 INFO L428 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:27:45,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:27:45,294 INFO L82 PathProgramCache]: Analyzing trace with hash -953421362, now seen corresponding path program 13 times [2021-05-06 10:27:45,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:27:45,294 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056441114] [2021-05-06 10:27:45,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:27:45,297 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:27:45,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1199393111] [2021-05-06 10:27:45,297 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 [2021-05-06 10:27:45,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 10:27:45,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 60 conjunts are in the unsatisfiable core [2021-05-06 10:27:45,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:27:46,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:46,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:46,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:46,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:46,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:46,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:46,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:46,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:46,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:46,124 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 28 proven. 364 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2021-05-06 10:27:46,124 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:27:46,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056441114] [2021-05-06 10:27:46,124 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:27:46,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199393111] [2021-05-06 10:27:46,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199393111] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:27:46,124 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:27:46,124 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-05-06 10:27:46,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621867778] [2021-05-06 10:27:46,124 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-06 10:27:46,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:27:46,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-06 10:27:46,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2021-05-06 10:27:46,125 INFO L87 Difference]: Start difference. First operand 125 states and 126 transitions. Second operand has 19 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 states have internal predecessors, (51), 16 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-06 10:27:46,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:27:46,418 INFO L93 Difference]: Finished difference Result 130 states and 132 transitions. [2021-05-06 10:27:46,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-06 10:27:46,418 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 states have internal predecessors, (51), 16 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) Word has length 122 [2021-05-06 10:27:46,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:27:46,419 INFO L225 Difference]: With dead ends: 130 [2021-05-06 10:27:46,419 INFO L226 Difference]: Without dead ends: 127 [2021-05-06 10:27:46,419 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 157.6ms TimeCoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2021-05-06 10:27:46,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-05-06 10:27:46,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2021-05-06 10:27:46,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 93 states have (on average 1.021505376344086) internal successors, (95), 93 states have internal predecessors, (95), 18 states have call successors, (18), 17 states have call predecessors, (18), 15 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-06 10:27:46,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 129 transitions. [2021-05-06 10:27:46,421 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 129 transitions. Word has length 122 [2021-05-06 10:27:46,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:27:46,421 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 129 transitions. [2021-05-06 10:27:46,421 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 states have internal predecessors, (51), 16 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-06 10:27:46,422 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 129 transitions. [2021-05-06 10:27:46,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-05-06 10:27:46,422 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:27:46,422 INFO L523 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:27:46,627 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-05-06 10:27:46,627 INFO L428 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:27:46,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:27:46,628 INFO L82 PathProgramCache]: Analyzing trace with hash -554004687, now seen corresponding path program 14 times [2021-05-06 10:27:46,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:27:46,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820009350] [2021-05-06 10:27:46,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:27:46,634 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:27:46,634 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [529704786] [2021-05-06 10:27:46,634 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 [2021-05-06 10:27:46,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 10:27:46,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:27:46,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-06 10:27:46,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:27:46,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:46,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:46,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:46,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:46,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:46,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:46,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:46,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:46,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:46,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:46,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:46,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:46,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:46,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:46,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:46,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:46,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:46,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:46,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:46,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:46,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:46,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:46,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:46,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:46,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:46,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:46,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:46,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:46,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:46,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:46,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:46,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:46,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:46,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:46,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:46,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:46,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:46,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:46,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:46,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:46,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:46,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:46,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:46,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:46,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:46,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:46,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:46,936 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 28 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 10:27:46,936 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:27:46,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820009350] [2021-05-06 10:27:46,936 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:27:46,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529704786] [2021-05-06 10:27:46,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529704786] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:27:46,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:27:46,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-05-06 10:27:46,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047712452] [2021-05-06 10:27:46,936 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-06 10:27:46,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:27:46,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-06 10:27:46,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2021-05-06 10:27:46,937 INFO L87 Difference]: Start difference. First operand 127 states and 129 transitions. Second operand has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 17 states have internal predecessors, (92), 17 states have call successors, (17), 17 states have call predecessors, (17), 15 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-06 10:27:47,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:27:47,118 INFO L93 Difference]: Finished difference Result 133 states and 134 transitions. [2021-05-06 10:27:47,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-06 10:27:47,118 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 17 states have internal predecessors, (92), 17 states have call successors, (17), 17 states have call predecessors, (17), 15 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) Word has length 124 [2021-05-06 10:27:47,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:27:47,119 INFO L225 Difference]: With dead ends: 133 [2021-05-06 10:27:47,119 INFO L226 Difference]: Without dead ends: 133 [2021-05-06 10:27:47,119 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 194.6ms TimeCoverageRelationStatistics Valid=376, Invalid=616, Unknown=0, NotChecked=0, Total=992 [2021-05-06 10:27:47,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-05-06 10:27:47,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2021-05-06 10:27:47,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 98 states have (on average 1.0204081632653061) internal successors, (100), 98 states have internal predecessors, (100), 18 states have call successors, (18), 18 states have call predecessors, (18), 16 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-06 10:27:47,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 134 transitions. [2021-05-06 10:27:47,122 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 134 transitions. Word has length 124 [2021-05-06 10:27:47,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:27:47,122 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 134 transitions. [2021-05-06 10:27:47,122 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 17 states have internal predecessors, (92), 17 states have call successors, (17), 17 states have call predecessors, (17), 15 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-06 10:27:47,122 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 134 transitions. [2021-05-06 10:27:47,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-05-06 10:27:47,122 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:27:47,122 INFO L523 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:27:47,340 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-05-06 10:27:47,341 INFO L428 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:27:47,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:27:47,341 INFO L82 PathProgramCache]: Analyzing trace with hash -1206963793, now seen corresponding path program 14 times [2021-05-06 10:27:47,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:27:47,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955484653] [2021-05-06 10:27:47,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:27:47,345 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:27:47,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1560792628] [2021-05-06 10:27:47,345 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:27:47,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 10:27:47,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:27:47,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 64 conjunts are in the unsatisfiable core [2021-05-06 10:27:47,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:27:48,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:48,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:48,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:48,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:48,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:48,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:48,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:48,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:48,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:48,337 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 30 proven. 420 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2021-05-06 10:27:48,337 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:27:48,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955484653] [2021-05-06 10:27:48,338 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:27:48,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560792628] [2021-05-06 10:27:48,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560792628] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:27:48,338 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:27:48,338 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-05-06 10:27:48,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925645001] [2021-05-06 10:27:48,338 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-06 10:27:48,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:27:48,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-06 10:27:48,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2021-05-06 10:27:48,339 INFO L87 Difference]: Start difference. First operand 133 states and 134 transitions. Second operand has 20 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 17 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-06 10:27:48,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:27:48,671 INFO L93 Difference]: Finished difference Result 138 states and 140 transitions. [2021-05-06 10:27:48,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-06 10:27:48,673 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 17 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Word has length 130 [2021-05-06 10:27:48,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:27:48,674 INFO L225 Difference]: With dead ends: 138 [2021-05-06 10:27:48,674 INFO L226 Difference]: Without dead ends: 135 [2021-05-06 10:27:48,674 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 205.8ms TimeCoverageRelationStatistics Valid=45, Invalid=417, Unknown=0, NotChecked=0, Total=462 [2021-05-06 10:27:48,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-05-06 10:27:48,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2021-05-06 10:27:48,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 99 states have (on average 1.02020202020202) internal successors, (101), 99 states have internal predecessors, (101), 19 states have call successors, (19), 18 states have call predecessors, (19), 16 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-06 10:27:48,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 137 transitions. [2021-05-06 10:27:48,677 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 137 transitions. Word has length 130 [2021-05-06 10:27:48,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:27:48,677 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 137 transitions. [2021-05-06 10:27:48,677 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 17 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-06 10:27:48,677 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 137 transitions. [2021-05-06 10:27:48,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-05-06 10:27:48,678 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:27:48,678 INFO L523 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:27:48,883 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-05-06 10:27:48,883 INFO L428 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:27:48,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:27:48,883 INFO L82 PathProgramCache]: Analyzing trace with hash 604854994, now seen corresponding path program 15 times [2021-05-06 10:27:48,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:27:48,883 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917140448] [2021-05-06 10:27:48,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:27:48,897 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:27:48,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [53711011] [2021-05-06 10:27:48,897 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:27:49,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-05-06 10:27:49,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:27:49,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-06 10:27:49,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:27:49,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:49,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:49,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:49,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:49,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:49,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:49,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:49,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:49,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:49,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:49,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:49,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:49,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:49,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:49,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:49,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:49,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:49,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:49,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:49,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:49,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:49,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:49,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:49,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:49,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:49,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:49,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:49,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:49,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:49,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:49,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:49,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:49,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:49,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:49,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:49,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:49,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:49,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:49,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:49,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:49,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:49,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:49,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:49,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:49,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:49,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:49,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:49,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:49,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:49,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:49,826 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 30 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 10:27:49,826 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:27:49,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917140448] [2021-05-06 10:27:49,826 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:27:49,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53711011] [2021-05-06 10:27:49,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53711011] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:27:49,826 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:27:49,826 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-05-06 10:27:49,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009344164] [2021-05-06 10:27:49,827 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-06 10:27:49,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:27:49,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-06 10:27:49,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2021-05-06 10:27:49,827 INFO L87 Difference]: Start difference. First operand 135 states and 137 transitions. Second operand has 19 states, 19 states have (on average 5.157894736842105) internal successors, (98), 18 states have internal predecessors, (98), 18 states have call successors, (18), 18 states have call predecessors, (18), 16 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-06 10:27:50,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:27:50,080 INFO L93 Difference]: Finished difference Result 141 states and 142 transitions. [2021-05-06 10:27:50,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-06 10:27:50,081 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.157894736842105) internal successors, (98), 18 states have internal predecessors, (98), 18 states have call successors, (18), 18 states have call predecessors, (18), 16 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Word has length 132 [2021-05-06 10:27:50,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:27:50,082 INFO L225 Difference]: With dead ends: 141 [2021-05-06 10:27:50,082 INFO L226 Difference]: Without dead ends: 141 [2021-05-06 10:27:50,082 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 240.9ms TimeCoverageRelationStatistics Valid=425, Invalid=697, Unknown=0, NotChecked=0, Total=1122 [2021-05-06 10:27:50,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-05-06 10:27:50,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2021-05-06 10:27:50,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 104 states have (on average 1.0192307692307692) internal successors, (106), 104 states have internal predecessors, (106), 19 states have call successors, (19), 19 states have call predecessors, (19), 17 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-06 10:27:50,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 142 transitions. [2021-05-06 10:27:50,084 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 142 transitions. Word has length 132 [2021-05-06 10:27:50,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:27:50,084 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 142 transitions. [2021-05-06 10:27:50,085 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.157894736842105) internal successors, (98), 18 states have internal predecessors, (98), 18 states have call successors, (18), 18 states have call predecessors, (18), 16 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-06 10:27:50,085 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 142 transitions. [2021-05-06 10:27:50,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-05-06 10:27:50,085 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:27:50,085 INFO L523 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:27:50,290 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-05-06 10:27:50,290 INFO L428 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:27:50,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:27:50,291 INFO L82 PathProgramCache]: Analyzing trace with hash 1030291600, now seen corresponding path program 15 times [2021-05-06 10:27:50,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:27:50,291 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328160569] [2021-05-06 10:27:50,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:27:50,295 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:27:50,295 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1285127308] [2021-05-06 10:27:50,295 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:27:51,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-05-06 10:27:51,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:27:51,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 76 conjunts are in the unsatisfiable core [2021-05-06 10:27:51,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:27:51,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:51,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:51,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:51,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:51,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:51,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:51,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:51,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:51,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:51,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:51,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:51,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:51,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:51,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:51,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:51,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:51,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:51,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:51,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:51,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:51,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:51,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:51,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:51,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:51,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:51,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:51,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:51,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:51,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:51,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:51,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:51,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:51,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:51,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:51,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:51,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:51,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:51,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:51,527 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 76 proven. 481 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2021-05-06 10:27:51,528 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:27:51,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328160569] [2021-05-06 10:27:51,528 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:27:51,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285127308] [2021-05-06 10:27:51,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285127308] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:27:51,528 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:27:51,528 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2021-05-06 10:27:51,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349792229] [2021-05-06 10:27:51,528 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-06 10:27:51,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:27:51,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-06 10:27:51,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=462, Unknown=0, NotChecked=0, Total=506 [2021-05-06 10:27:51,529 INFO L87 Difference]: Start difference. First operand 141 states and 142 transitions. Second operand has 23 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 states have internal predecessors, (60), 18 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-06 10:27:52,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:27:52,027 INFO L93 Difference]: Finished difference Result 146 states and 148 transitions. [2021-05-06 10:27:52,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-06 10:27:52,027 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 states have internal predecessors, (60), 18 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) Word has length 138 [2021-05-06 10:27:52,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:27:52,028 INFO L225 Difference]: With dead ends: 146 [2021-05-06 10:27:52,028 INFO L226 Difference]: Without dead ends: 143 [2021-05-06 10:27:52,028 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 305.7ms TimeCoverageRelationStatistics Valid=59, Invalid=591, Unknown=0, NotChecked=0, Total=650 [2021-05-06 10:27:52,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-05-06 10:27:52,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2021-05-06 10:27:52,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 105 states have (on average 1.019047619047619) internal successors, (107), 105 states have internal predecessors, (107), 20 states have call successors, (20), 19 states have call predecessors, (20), 17 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-06 10:27:52,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 145 transitions. [2021-05-06 10:27:52,030 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 145 transitions. Word has length 138 [2021-05-06 10:27:52,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:27:52,031 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 145 transitions. [2021-05-06 10:27:52,031 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 states have internal predecessors, (60), 18 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-06 10:27:52,031 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 145 transitions. [2021-05-06 10:27:52,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-05-06 10:27:52,031 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:27:52,031 INFO L523 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:27:52,232 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-05-06 10:27:52,232 INFO L428 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:27:52,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:27:52,232 INFO L82 PathProgramCache]: Analyzing trace with hash -1171327629, now seen corresponding path program 16 times [2021-05-06 10:27:52,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:27:52,232 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622812723] [2021-05-06 10:27:52,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:27:52,236 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:27:52,236 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [739954983] [2021-05-06 10:27:52,236 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:27:53,151 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 10:27:53,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:27:53,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-06 10:27:53,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:27:53,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:53,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:53,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:53,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:53,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:53,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:53,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:53,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:53,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:53,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:53,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:53,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:53,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:53,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:53,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:53,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:53,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:53,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:53,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:53,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:53,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:53,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:53,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:53,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:53,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:53,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:53,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:53,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:53,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:53,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:53,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:53,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:53,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:53,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:53,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:53,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:53,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:53,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:53,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:53,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:53,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:53,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:53,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:53,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:53,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:53,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:53,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:53,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:53,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:53,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:53,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:53,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:53,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:53,474 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 32 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 10:27:53,474 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:27:53,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622812723] [2021-05-06 10:27:53,474 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:27:53,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739954983] [2021-05-06 10:27:53,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739954983] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:27:53,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:27:53,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-05-06 10:27:53,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968683257] [2021-05-06 10:27:53,475 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-06 10:27:53,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:27:53,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-06 10:27:53,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2021-05-06 10:27:53,475 INFO L87 Difference]: Start difference. First operand 143 states and 145 transitions. Second operand has 20 states, 20 states have (on average 5.2) internal successors, (104), 19 states have internal predecessors, (104), 19 states have call successors, (19), 19 states have call predecessors, (19), 17 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-06 10:27:53,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:27:53,708 INFO L93 Difference]: Finished difference Result 149 states and 150 transitions. [2021-05-06 10:27:53,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-06 10:27:53,708 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 19 states have internal predecessors, (104), 19 states have call successors, (19), 19 states have call predecessors, (19), 17 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) Word has length 140 [2021-05-06 10:27:53,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:27:53,709 INFO L225 Difference]: With dead ends: 149 [2021-05-06 10:27:53,709 INFO L226 Difference]: Without dead ends: 149 [2021-05-06 10:27:53,709 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 264.1ms TimeCoverageRelationStatistics Valid=477, Invalid=783, Unknown=0, NotChecked=0, Total=1260 [2021-05-06 10:27:53,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-05-06 10:27:53,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2021-05-06 10:27:53,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 110 states have (on average 1.018181818181818) internal successors, (112), 110 states have internal predecessors, (112), 20 states have call successors, (20), 20 states have call predecessors, (20), 18 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-06 10:27:53,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 150 transitions. [2021-05-06 10:27:53,712 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 150 transitions. Word has length 140 [2021-05-06 10:27:53,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:27:53,712 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 150 transitions. [2021-05-06 10:27:53,712 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 19 states have internal predecessors, (104), 19 states have call successors, (19), 19 states have call predecessors, (19), 17 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-06 10:27:53,712 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 150 transitions. [2021-05-06 10:27:53,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-05-06 10:27:53,712 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:27:53,712 INFO L523 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 17, 17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:27:53,918 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-05-06 10:27:53,918 INFO L428 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:27:53,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:27:53,918 INFO L82 PathProgramCache]: Analyzing trace with hash -1153802639, now seen corresponding path program 16 times [2021-05-06 10:27:53,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:27:53,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259024973] [2021-05-06 10:27:53,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:27:53,922 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:27:53,922 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1815320443] [2021-05-06 10:27:53,922 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 10:27:54,684 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 10:27:54,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 10:27:54,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 72 conjunts are in the unsatisfiable core [2021-05-06 10:27:54,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 10:27:55,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:55,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:55,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:55,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:55,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:55,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:55,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:55,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:55,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 10:27:55,073 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 34 proven. 544 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2021-05-06 10:27:55,073 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 10:27:55,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259024973] [2021-05-06 10:27:55,073 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 10:27:55,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815320443] [2021-05-06 10:27:55,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815320443] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 10:27:55,074 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 10:27:55,074 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2021-05-06 10:27:55,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600078101] [2021-05-06 10:27:55,074 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-06 10:27:55,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 10:27:55,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-06 10:27:55,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2021-05-06 10:27:55,074 INFO L87 Difference]: Start difference. First operand 149 states and 150 transitions. Second operand has 22 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 19 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-06 10:27:55,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 10:27:55,465 INFO L93 Difference]: Finished difference Result 154 states and 156 transitions. [2021-05-06 10:27:55,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-06 10:27:55,465 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 19 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Word has length 146 [2021-05-06 10:27:55,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 10:27:55,466 INFO L225 Difference]: With dead ends: 154 [2021-05-06 10:27:55,466 INFO L226 Difference]: Without dead ends: 151 [2021-05-06 10:27:55,466 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 224.4ms TimeCoverageRelationStatistics Valid=49, Invalid=503, Unknown=0, NotChecked=0, Total=552 [2021-05-06 10:27:55,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-05-06 10:27:55,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2021-05-06 10:27:55,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 111 states have (on average 1.018018018018018) internal successors, (113), 111 states have internal predecessors, (113), 21 states have call successors, (21), 20 states have call predecessors, (21), 18 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2021-05-06 10:27:55,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 153 transitions. [2021-05-06 10:27:55,469 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 153 transitions. Word has length 146 [2021-05-06 10:27:55,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 10:27:55,469 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 153 transitions. [2021-05-06 10:27:55,469 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 21 states have (on average 2.857142857142857) internal successors, (60), 21 states have internal predecessors, (60), 19 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-06 10:27:55,470 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 153 transitions. [2021-05-06 10:27:55,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-05-06 10:27:55,470 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 10:27:55,470 INFO L523 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 10:27:55,675 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-05-06 10:27:55,675 INFO L428 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 10:27:55,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 10:27:55,676 INFO L82 PathProgramCache]: Analyzing trace with hash 153116436, now seen corresponding path program 17 times [2021-05-06 10:27:55,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 10:27:55,676 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473972187] [2021-05-06 10:27:55,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 10:27:55,680 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 10:27:55,680 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1114905093] [2021-05-06 10:27:55,680 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true