/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/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/hard-ll_valuebound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 15:28:31,400 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 15:28:31,402 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 15:28:31,440 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 15:28:31,464 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 15:28:31,466 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 15:28:31,467 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 15:28:31,468 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 15:28:31,471 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 15:28:31,472 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 15:28:31,474 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 15:28:31,479 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 15:28:31,480 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 15:28:31,482 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 15:28:31,482 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 15:28:31,493 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 15:28:31,495 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 15:28:31,502 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 15:28:31,502 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 15:28:31,503 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 15:28:31,504 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-05-02 15:28:31,522 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 15:28:31,523 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 15:28:31,524 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 15:28:31,524 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 15:28:31,524 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 15:28:31,524 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 15:28:31,525 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 15:28:31,525 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 15:28:31,525 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 15:28:31,525 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 15:28:31,525 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 15:28:31,525 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 15:28:31,526 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 15:28:31,526 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 15:28:31,526 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 15:28:31,526 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 15:28:31,526 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 15:28:31,526 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 15:28:31,526 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 15:28:31,527 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 15:28:31,527 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 15:28:31,527 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 15:28:31,527 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 15:28:31,527 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 15:28:31,527 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 15:28:31,527 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 15:28:31,528 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 15:28:31,528 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 15:28:31,528 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 15:28:31,840 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 15:28:31,874 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 15:28:31,877 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 15:28:31,878 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 15:28:31,879 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 15:28:31,879 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-ll_valuebound20.c [2021-05-02 15:28:31,934 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ec2cfb997/e25ad50000fc4278876c0ef871f3c042/FLAG9ebe2bcc9 [2021-05-02 15:28:32,352 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 15:28:32,352 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-ll_valuebound20.c [2021-05-02 15:28:32,358 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ec2cfb997/e25ad50000fc4278876c0ef871f3c042/FLAG9ebe2bcc9 [2021-05-02 15:28:32,775 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ec2cfb997/e25ad50000fc4278876c0ef871f3c042 [2021-05-02 15:28:32,777 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 15:28:32,779 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 15:28:32,783 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 15:28:32,784 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 15:28:32,787 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 15:28:32,788 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 03:28:32" (1/1) ... [2021-05-02 15:28:32,789 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30493a19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:28:32, skipping insertion in model container [2021-05-02 15:28:32,790 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 03:28:32" (1/1) ... [2021-05-02 15:28:32,799 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 15:28:32,815 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 15:28:32,913 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/hard-ll_valuebound20.c[546,559] [2021-05-02 15:28:32,928 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 15:28:32,935 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 15:28:32,954 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/hard-ll_valuebound20.c[546,559] [2021-05-02 15:28:32,975 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 15:28:32,999 INFO L208 MainTranslator]: Completed translation [2021-05-02 15:28:32,999 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:28:32 WrapperNode [2021-05-02 15:28:33,000 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 15:28:33,001 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 15:28:33,001 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 15:28:33,001 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 15:28:33,026 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:28:32" (1/1) ... [2021-05-02 15:28:33,027 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:28:32" (1/1) ... [2021-05-02 15:28:33,041 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:28:32" (1/1) ... [2021-05-02 15:28:33,042 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:28:32" (1/1) ... [2021-05-02 15:28:33,053 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:28:32" (1/1) ... [2021-05-02 15:28:33,057 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:28:32" (1/1) ... [2021-05-02 15:28:33,058 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:28:32" (1/1) ... [2021-05-02 15:28:33,059 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 15:28:33,060 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 15:28:33,062 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 15:28:33,062 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 15:28:33,062 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:28:32" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 15:28:33,139 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 15:28:33,140 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 15:28:33,140 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 15:28:33,140 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 15:28:33,140 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 15:28:33,140 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 15:28:33,141 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 15:28:33,141 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 15:28:33,141 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 15:28:33,141 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 15:28:33,141 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-02 15:28:33,141 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 15:28:33,142 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 15:28:33,142 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 15:28:33,143 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 15:28:33,143 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 15:28:33,143 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 15:28:33,143 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 15:28:33,143 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 15:28:33,143 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 15:28:33,451 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 15:28:33,451 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-02 15:28:33,452 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 03:28:33 BoogieIcfgContainer [2021-05-02 15:28:33,452 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 15:28:33,454 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 15:28:33,454 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 15:28:33,456 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 15:28:33,456 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 03:28:32" (1/3) ... [2021-05-02 15:28:33,457 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f82876d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 03:28:33, skipping insertion in model container [2021-05-02 15:28:33,457 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:28:32" (2/3) ... [2021-05-02 15:28:33,457 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f82876d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 03:28:33, skipping insertion in model container [2021-05-02 15:28:33,457 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 03:28:33" (3/3) ... [2021-05-02 15:28:33,458 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-ll_valuebound20.c [2021-05-02 15:28:33,463 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 15:28:33,466 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 15:28:33,481 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 15:28:33,509 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 15:28:33,509 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 15:28:33,510 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 15:28:33,510 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 15:28:33,510 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 15:28:33,510 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 15:28:33,510 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 15:28:33,510 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 15:28:33,526 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 15:28:33,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 15:28:33,532 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:28:33,532 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:28:33,533 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:28:33,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:28:33,542 INFO L82 PathProgramCache]: Analyzing trace with hash -1784424332, now seen corresponding path program 1 times [2021-05-02 15:28:33,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:28:33,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056884186] [2021-05-02 15:28:33,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:28:33,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:28:33,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 15:28:33,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:28:33,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 15:28:33,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:28:33,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 15:28:33,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:28:33,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 15:28:33,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:28:33,880 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 15:28:33,881 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:28:33,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056884186] [2021-05-02 15:28:33,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056884186] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:28:33,882 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:28:33,882 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 15:28:33,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991185324] [2021-05-02 15:28:33,887 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 15:28:33,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:28:33,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 15:28:33,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 15:28:33,907 INFO L87 Difference]: Start difference. First operand has 38 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 15:28:34,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:28:34,092 INFO L93 Difference]: Finished difference Result 69 states and 110 transitions. [2021-05-02 15:28:34,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 15:28:34,093 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2021-05-02 15:28:34,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:28:34,100 INFO L225 Difference]: With dead ends: 69 [2021-05-02 15:28:34,100 INFO L226 Difference]: Without dead ends: 33 [2021-05-02 15:28:34,110 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 77.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 15:28:34,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-02 15:28:34,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-05-02 15:28:34,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 15:28:34,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2021-05-02 15:28:34,159 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 28 [2021-05-02 15:28:34,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:28:34,159 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2021-05-02 15:28:34,159 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 15:28:34,159 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2021-05-02 15:28:34,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 15:28:34,165 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:28:34,165 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:28:34,165 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 15:28:34,165 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:28:34,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:28:34,166 INFO L82 PathProgramCache]: Analyzing trace with hash 1361835634, now seen corresponding path program 1 times [2021-05-02 15:28:34,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:28:34,167 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401303379] [2021-05-02 15:28:34,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:28:34,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:28:34,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 15:28:34,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:28:34,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 15:28:34,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:28:34,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 15:28:34,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:28:34,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 15:28:34,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:28:34,390 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 15:28:34,390 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:28:34,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401303379] [2021-05-02 15:28:34,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401303379] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:28:34,391 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:28:34,391 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 15:28:34,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132739677] [2021-05-02 15:28:34,392 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 15:28:34,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:28:34,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 15:28:34,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 15:28:34,393 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-02 15:28:34,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:28:34,826 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions. [2021-05-02 15:28:34,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 15:28:34,826 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 28 [2021-05-02 15:28:34,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:28:34,829 INFO L225 Difference]: With dead ends: 46 [2021-05-02 15:28:34,830 INFO L226 Difference]: Without dead ends: 44 [2021-05-02 15:28:34,832 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 212.4ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:28:34,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-02 15:28:34,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2021-05-02 15:28:34,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 12 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 15:28:34,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2021-05-02 15:28:34,862 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 28 [2021-05-02 15:28:34,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:28:34,862 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2021-05-02 15:28:34,862 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-02 15:28:34,863 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2021-05-02 15:28:34,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 15:28:34,863 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:28:34,864 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:28:34,864 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 15:28:34,864 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:28:34,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:28:34,864 INFO L82 PathProgramCache]: Analyzing trace with hash 1382067636, now seen corresponding path program 1 times [2021-05-02 15:28:34,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:28:34,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604322802] [2021-05-02 15:28:34,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:28:34,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:28:34,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 15:28:34,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:28:34,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 15:28:34,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:28:34,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 15:28:34,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:28:34,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 15:28:34,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:28:34,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-05-02 15:28:34,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:28:34,996 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 15:28:34,996 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:28:34,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604322802] [2021-05-02 15:28:34,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604322802] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:28:34,996 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:28:34,997 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 15:28:34,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222277976] [2021-05-02 15:28:34,997 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 15:28:34,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:28:34,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 15:28:34,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 15:28:34,998 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 15:28:35,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:28:35,320 INFO L93 Difference]: Finished difference Result 50 states and 63 transitions. [2021-05-02 15:28:35,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 15:28:35,321 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-05-02 15:28:35,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:28:35,322 INFO L225 Difference]: With dead ends: 50 [2021-05-02 15:28:35,322 INFO L226 Difference]: Without dead ends: 48 [2021-05-02 15:28:35,322 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 146.2ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:28:35,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-02 15:28:35,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2021-05-02 15:28:35,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 12 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 15:28:35,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2021-05-02 15:28:35,331 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 33 [2021-05-02 15:28:35,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:28:35,331 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2021-05-02 15:28:35,331 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 15:28:35,331 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2021-05-02 15:28:35,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-02 15:28:35,332 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:28:35,332 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:28:35,333 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-02 15:28:35,333 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:28:35,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:28:35,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1455208590, now seen corresponding path program 1 times [2021-05-02 15:28:35,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:28:35,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647442262] [2021-05-02 15:28:35,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:28:35,352 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:28:35,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [604493265] [2021-05-02 15:28:35,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:28:35,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:28:35,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 15:28:35,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:28:35,617 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-05-02 15:28:35,618 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:28:35,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647442262] [2021-05-02 15:28:35,618 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:28:35,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604493265] [2021-05-02 15:28:35,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604493265] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:28:35,618 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:28:35,619 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 15:28:35,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390586493] [2021-05-02 15:28:35,620 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 15:28:35,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:28:35,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 15:28:35,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-02 15:28:35,622 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 15:28:35,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:28:35,797 INFO L93 Difference]: Finished difference Result 73 states and 92 transitions. [2021-05-02 15:28:35,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 15:28:35,798 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 38 [2021-05-02 15:28:35,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:28:35,799 INFO L225 Difference]: With dead ends: 73 [2021-05-02 15:28:35,799 INFO L226 Difference]: Without dead ends: 59 [2021-05-02 15:28:35,800 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 60.1ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:28:35,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-05-02 15:28:35,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-05-02 15:28:35,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 35 states have internal predecessors, (38), 18 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 15:28:35,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 71 transitions. [2021-05-02 15:28:35,812 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 71 transitions. Word has length 38 [2021-05-02 15:28:35,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:28:35,812 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 71 transitions. [2021-05-02 15:28:35,812 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 15:28:35,813 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 71 transitions. [2021-05-02 15:28:35,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-02 15:28:35,814 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:28:35,814 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:28:36,037 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:28:36,037 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:28:36,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:28:36,038 INFO L82 PathProgramCache]: Analyzing trace with hash -1688067263, now seen corresponding path program 1 times [2021-05-02 15:28:36,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:28:36,038 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33832908] [2021-05-02 15:28:36,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:28:36,050 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:28:36,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2060015893] [2021-05-02 15:28:36,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:28:36,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:28:36,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 15:28:36,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:28:36,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:36,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:36,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:36,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:36,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:36,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:36,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:36,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:36,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:36,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:36,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:36,436 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-05-02 15:28:36,436 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:28:36,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33832908] [2021-05-02 15:28:36,437 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:28:36,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060015893] [2021-05-02 15:28:36,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060015893] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:28:36,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:28:36,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-05-02 15:28:36,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119178250] [2021-05-02 15:28:36,438 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 15:28:36,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:28:36,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 15:28:36,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:28:36,439 INFO L87 Difference]: Start difference. First operand 59 states and 71 transitions. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 15:28:36,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:28:36,601 INFO L93 Difference]: Finished difference Result 69 states and 79 transitions. [2021-05-02 15:28:36,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 15:28:36,602 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 45 [2021-05-02 15:28:36,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:28:36,603 INFO L225 Difference]: With dead ends: 69 [2021-05-02 15:28:36,603 INFO L226 Difference]: Without dead ends: 58 [2021-05-02 15:28:36,603 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 108.8ms TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-05-02 15:28:36,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-05-02 15:28:36,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-05-02 15:28:36,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 35 states have internal predecessors, (38), 15 states have call successors, (15), 9 states have call predecessors, (15), 8 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 15:28:36,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2021-05-02 15:28:36,619 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 45 [2021-05-02 15:28:36,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:28:36,620 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2021-05-02 15:28:36,621 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 15:28:36,621 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2021-05-02 15:28:36,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-02 15:28:36,626 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:28:36,626 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:28:36,841 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:28:36,841 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:28:36,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:28:36,841 INFO L82 PathProgramCache]: Analyzing trace with hash -1471734606, now seen corresponding path program 1 times [2021-05-02 15:28:36,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:28:36,842 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818599836] [2021-05-02 15:28:36,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:28:36,848 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:28:36,848 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [463037912] [2021-05-02 15:28:36,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:28:36,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:28:36,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-02 15:28:36,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:28:36,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:36,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:37,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:37,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:37,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:37,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:37,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:37,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:37,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:37,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:37,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:37,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:37,148 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 24 proven. 8 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-05-02 15:28:37,149 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:28:37,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818599836] [2021-05-02 15:28:37,149 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:28:37,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463037912] [2021-05-02 15:28:37,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463037912] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:28:37,149 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:28:37,149 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 15:28:37,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011421326] [2021-05-02 15:28:37,150 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 15:28:37,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:28:37,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 15:28:37,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-02 15:28:37,151 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 15:28:37,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:28:37,419 INFO L93 Difference]: Finished difference Result 95 states and 118 transitions. [2021-05-02 15:28:37,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 15:28:37,420 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 55 [2021-05-02 15:28:37,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:28:37,424 INFO L225 Difference]: With dead ends: 95 [2021-05-02 15:28:37,426 INFO L226 Difference]: Without dead ends: 81 [2021-05-02 15:28:37,429 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 121.8ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-05-02 15:28:37,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-05-02 15:28:37,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2021-05-02 15:28:37,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 47 states have (on average 1.127659574468085) internal successors, (53), 49 states have internal predecessors, (53), 23 states have call successors, (23), 11 states have call predecessors, (23), 10 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-05-02 15:28:37,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 96 transitions. [2021-05-02 15:28:37,444 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 96 transitions. Word has length 55 [2021-05-02 15:28:37,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:28:37,445 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 96 transitions. [2021-05-02 15:28:37,445 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 15:28:37,445 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 96 transitions. [2021-05-02 15:28:37,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-05-02 15:28:37,446 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:28:37,446 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:28:37,660 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:28:37,661 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:28:37,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:28:37,661 INFO L82 PathProgramCache]: Analyzing trace with hash -1784683007, now seen corresponding path program 1 times [2021-05-02 15:28:37,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:28:37,662 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675036460] [2021-05-02 15:28:37,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:28:37,670 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:28:37,671 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [961904212] [2021-05-02 15:28:37,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:28:37,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:28:37,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-02 15:28:37,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:28:37,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:37,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:37,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:37,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:37,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:37,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:37,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:37,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:37,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:37,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:37,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:38,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:38,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:38,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:38,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:38,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:38,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:38,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:38,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:38,260 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 18 proven. 5 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-05-02 15:28:38,260 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:28:38,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675036460] [2021-05-02 15:28:38,260 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:28:38,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961904212] [2021-05-02 15:28:38,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961904212] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:28:38,260 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:28:38,261 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 15:28:38,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387085292] [2021-05-02 15:28:38,264 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 15:28:38,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:28:38,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 15:28:38,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 15:28:38,265 INFO L87 Difference]: Start difference. First operand 81 states and 96 transitions. Second operand has 11 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-02 15:28:38,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:28:38,591 INFO L93 Difference]: Finished difference Result 91 states and 104 transitions. [2021-05-02 15:28:38,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 15:28:38,593 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) Word has length 62 [2021-05-02 15:28:38,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:28:38,594 INFO L225 Difference]: With dead ends: 91 [2021-05-02 15:28:38,594 INFO L226 Difference]: Without dead ends: 84 [2021-05-02 15:28:38,595 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 207.2ms TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-05-02 15:28:38,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-05-02 15:28:38,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2021-05-02 15:28:38,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 51 states have (on average 1.0980392156862746) internal successors, (56), 52 states have internal predecessors, (56), 20 states have call successors, (20), 13 states have call predecessors, (20), 12 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-02 15:28:38,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 94 transitions. [2021-05-02 15:28:38,605 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 94 transitions. Word has length 62 [2021-05-02 15:28:38,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:28:38,605 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 94 transitions. [2021-05-02 15:28:38,606 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-02 15:28:38,606 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 94 transitions. [2021-05-02 15:28:38,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-05-02 15:28:38,607 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:28:38,607 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:28:38,820 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:28:38,821 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:28:38,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:28:38,821 INFO L82 PathProgramCache]: Analyzing trace with hash -1254068366, now seen corresponding path program 2 times [2021-05-02 15:28:38,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:28:38,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500559033] [2021-05-02 15:28:38,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:28:38,829 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:28:38,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [803283763] [2021-05-02 15:28:38,830 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:28:38,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 15:28:38,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:28:38,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-02 15:28:38,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:28:38,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:38,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:38,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:38,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:38,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:38,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:38,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:38,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:38,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:38,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:38,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:38,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:39,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:39,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:39,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:39,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:39,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:39,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:39,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:39,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:39,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:39,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:39,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:39,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:39,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:39,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:39,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:39,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:39,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:39,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:39,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:39,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:39,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:39,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:39,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:39,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:39,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:39,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:39,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:39,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:39,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:39,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:39,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:39,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:39,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:39,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:39,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:39,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:39,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:39,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:39,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:39,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:39,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:39,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:39,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:39,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:39,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:39,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:39,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:39,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:39,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:39,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:39,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:39,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:39,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:39,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:39,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:39,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:39,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:39,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:39,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:39,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:39,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:39,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:39,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:39,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:39,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:39,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:39,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:39,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:39,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:39,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:39,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:39,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:39,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:39,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:39,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:39,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:39,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:39,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:39,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:39,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:39,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:39,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:39,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:39,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:39,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:39,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:39,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:39,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:39,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:39,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:39,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:39,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:39,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:39,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:39,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:39,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:39,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:39,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:39,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:39,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:39,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:39,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:39,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:39,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:39,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:39,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:39,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:39,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:39,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:39,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:39,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:39,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:39,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:39,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:39,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:39,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:39,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:39,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:39,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:39,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:39,694 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 50 proven. 21 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-05-02 15:28:39,694 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:28:39,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500559033] [2021-05-02 15:28:39,695 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:28:39,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803283763] [2021-05-02 15:28:39,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803283763] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:28:39,695 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:28:39,695 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 15:28:39,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217591075] [2021-05-02 15:28:39,696 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 15:28:39,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:28:39,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 15:28:39,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-05-02 15:28:39,697 INFO L87 Difference]: Start difference. First operand 84 states and 94 transitions. Second operand has 14 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 15:28:40,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:28:40,135 INFO L93 Difference]: Finished difference Result 125 states and 149 transitions. [2021-05-02 15:28:40,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 15:28:40,136 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) Word has length 72 [2021-05-02 15:28:40,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:28:40,137 INFO L225 Difference]: With dead ends: 125 [2021-05-02 15:28:40,137 INFO L226 Difference]: Without dead ends: 116 [2021-05-02 15:28:40,137 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 166.8ms TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-05-02 15:28:40,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-05-02 15:28:40,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2021-05-02 15:28:40,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 70 states have (on average 1.1285714285714286) internal successors, (79), 72 states have internal predecessors, (79), 30 states have call successors, (30), 16 states have call predecessors, (30), 15 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2021-05-02 15:28:40,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 136 transitions. [2021-05-02 15:28:40,151 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 136 transitions. Word has length 72 [2021-05-02 15:28:40,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:28:40,152 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 136 transitions. [2021-05-02 15:28:40,152 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 15:28:40,152 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 136 transitions. [2021-05-02 15:28:40,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-02 15:28:40,153 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:28:40,153 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:28:40,368 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-05-02 15:28:40,369 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:28:40,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:28:40,369 INFO L82 PathProgramCache]: Analyzing trace with hash 680531353, now seen corresponding path program 1 times [2021-05-02 15:28:40,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:28:40,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69709373] [2021-05-02 15:28:40,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:28:40,381 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:28:40,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1695056499] [2021-05-02 15:28:40,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:28:40,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:28:40,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-02 15:28:40,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:28:40,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:40,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:40,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:40,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:40,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:40,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:40,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:40,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:40,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:40,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:40,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:40,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:40,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:40,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:40,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:40,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:40,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:40,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:40,815 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-05-02 15:28:40,816 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:28:40,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69709373] [2021-05-02 15:28:40,816 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:28:40,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695056499] [2021-05-02 15:28:40,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695056499] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:28:40,816 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:28:40,816 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 15:28:40,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564184239] [2021-05-02 15:28:40,817 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 15:28:40,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:28:40,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 15:28:40,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-05-02 15:28:40,817 INFO L87 Difference]: Start difference. First operand 116 states and 136 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-02 15:28:41,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:28:41,087 INFO L93 Difference]: Finished difference Result 129 states and 153 transitions. [2021-05-02 15:28:41,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 15:28:41,088 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) Word has length 75 [2021-05-02 15:28:41,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:28:41,089 INFO L225 Difference]: With dead ends: 129 [2021-05-02 15:28:41,089 INFO L226 Difference]: Without dead ends: 127 [2021-05-02 15:28:41,090 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 140.2ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-05-02 15:28:41,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-05-02 15:28:41,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 125. [2021-05-02 15:28:41,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 76 states have (on average 1.144736842105263) internal successors, (87), 78 states have internal predecessors, (87), 32 states have call successors, (32), 17 states have call predecessors, (32), 16 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2021-05-02 15:28:41,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 148 transitions. [2021-05-02 15:28:41,104 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 148 transitions. Word has length 75 [2021-05-02 15:28:41,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:28:41,104 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 148 transitions. [2021-05-02 15:28:41,104 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-02 15:28:41,105 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 148 transitions. [2021-05-02 15:28:41,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-05-02 15:28:41,105 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:28:41,106 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:28:41,321 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:28:41,321 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:28:41,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:28:41,322 INFO L82 PathProgramCache]: Analyzing trace with hash -1211630783, now seen corresponding path program 2 times [2021-05-02 15:28:41,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:28:41,322 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439529060] [2021-05-02 15:28:41,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:28:41,328 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:28:41,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1463739410] [2021-05-02 15:28:41,329 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:28:41,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 15:28:41,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:28:41,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-02 15:28:41,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:28:41,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:41,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:41,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:41,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:41,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:41,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:41,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:41,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:41,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:41,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:41,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:41,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:41,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:41,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:41,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:41,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:41,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:41,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:41,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:41,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:41,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:41,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:41,644 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 41 proven. 7 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2021-05-02 15:28:41,645 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:28:41,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439529060] [2021-05-02 15:28:41,645 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:28:41,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463739410] [2021-05-02 15:28:41,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463739410] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:28:41,645 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:28:41,645 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 15:28:41,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930040499] [2021-05-02 15:28:41,646 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 15:28:41,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:28:41,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 15:28:41,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-02 15:28:41,647 INFO L87 Difference]: Start difference. First operand 125 states and 148 transitions. Second operand has 11 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-02 15:28:41,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:28:41,822 INFO L93 Difference]: Finished difference Result 138 states and 165 transitions. [2021-05-02 15:28:41,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 15:28:41,823 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 79 [2021-05-02 15:28:41,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:28:41,824 INFO L225 Difference]: With dead ends: 138 [2021-05-02 15:28:41,824 INFO L226 Difference]: Without dead ends: 135 [2021-05-02 15:28:41,825 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 84.6ms TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-05-02 15:28:41,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-05-02 15:28:41,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 134. [2021-05-02 15:28:41,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 82 states have (on average 1.146341463414634) internal successors, (94), 84 states have internal predecessors, (94), 34 states have call successors, (34), 18 states have call predecessors, (34), 17 states have return successors, (32), 31 states have call predecessors, (32), 32 states have call successors, (32) [2021-05-02 15:28:41,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 160 transitions. [2021-05-02 15:28:41,839 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 160 transitions. Word has length 79 [2021-05-02 15:28:41,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:28:41,839 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 160 transitions. [2021-05-02 15:28:41,839 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-02 15:28:41,839 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 160 transitions. [2021-05-02 15:28:41,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-02 15:28:41,840 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:28:41,840 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:28:42,057 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-05-02 15:28:42,057 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:28:42,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:28:42,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1566820819, now seen corresponding path program 2 times [2021-05-02 15:28:42,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:28:42,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327861800] [2021-05-02 15:28:42,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:28:42,064 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:28:42,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1600964910] [2021-05-02 15:28:42,065 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:28:42,121 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 15:28:42,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:28:42,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-02 15:28:42,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:28:42,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:42,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:42,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:42,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:42,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:42,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:42,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:42,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:42,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:42,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:42,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:42,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:42,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:42,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:42,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:42,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:42,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:42,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:42,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:42,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:42,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:42,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:42,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:42,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:42,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:42,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:42,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:42,429 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 24 proven. 8 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2021-05-02 15:28:42,430 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:28:42,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327861800] [2021-05-02 15:28:42,430 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:28:42,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600964910] [2021-05-02 15:28:42,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600964910] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:28:42,430 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:28:42,430 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 15:28:42,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155407008] [2021-05-02 15:28:42,431 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 15:28:42,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:28:42,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 15:28:42,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-02 15:28:42,432 INFO L87 Difference]: Start difference. First operand 134 states and 160 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-02 15:28:42,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:28:42,626 INFO L93 Difference]: Finished difference Result 161 states and 194 transitions. [2021-05-02 15:28:42,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 15:28:42,626 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) Word has length 80 [2021-05-02 15:28:42,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:28:42,629 INFO L225 Difference]: With dead ends: 161 [2021-05-02 15:28:42,629 INFO L226 Difference]: Without dead ends: 138 [2021-05-02 15:28:42,630 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 107.0ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-02 15:28:42,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-05-02 15:28:42,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2021-05-02 15:28:42,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 84 states have (on average 1.119047619047619) internal successors, (94), 87 states have internal predecessors, (94), 35 states have call successors, (35), 19 states have call predecessors, (35), 18 states have return successors, (32), 31 states have call predecessors, (32), 32 states have call successors, (32) [2021-05-02 15:28:42,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 161 transitions. [2021-05-02 15:28:42,649 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 161 transitions. Word has length 80 [2021-05-02 15:28:42,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:28:42,649 INFO L480 AbstractCegarLoop]: Abstraction has 138 states and 161 transitions. [2021-05-02 15:28:42,650 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-02 15:28:42,650 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 161 transitions. [2021-05-02 15:28:42,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-05-02 15:28:42,651 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:28:42,651 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:28:42,874 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-05-02 15:28:42,874 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:28:42,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:28:42,875 INFO L82 PathProgramCache]: Analyzing trace with hash -815356955, now seen corresponding path program 1 times [2021-05-02 15:28:42,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:28:42,875 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440362675] [2021-05-02 15:28:42,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:28:42,882 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:28:42,882 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1608512414] [2021-05-02 15:28:42,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:28:42,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:28:42,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-02 15:28:42,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:28:43,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:43,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:43,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:43,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:43,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:43,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:43,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:43,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:43,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:43,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:43,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:43,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:43,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:43,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:43,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:43,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:43,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:43,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:43,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:43,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:43,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:43,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:43,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:43,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:43,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:43,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:43,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:43,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:43,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:43,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:43,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:45,707 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2021-05-02 15:28:45,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:45,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:45,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:45,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:45,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:45,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:45,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:45,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:45,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:45,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:45,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:45,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:45,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:45,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:45,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:45,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:45,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:45,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:46,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:46,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:46,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:46,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:46,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:46,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:46,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:46,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:46,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:46,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:46,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:46,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:46,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:46,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:46,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:46,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:46,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:46,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:46,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:46,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:46,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:46,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:46,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:46,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:46,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:46,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:46,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:46,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:46,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:46,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:46,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:46,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:46,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:46,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:46,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:46,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:46,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:46,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:46,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:46,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:46,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:46,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:46,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:46,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:46,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:46,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:46,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:46,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:46,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:46,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:46,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:46,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:46,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:46,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:46,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:46,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:46,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:46,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:46,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:46,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:46,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:46,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:46,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:46,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:46,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:46,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:46,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:46,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:46,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:46,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:46,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:46,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:46,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:46,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:46,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:46,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:46,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:46,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:46,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:46,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:46,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:46,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:46,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:46,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:46,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:46,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:46,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:46,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:46,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:46,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:46,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:46,548 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 72 proven. 11 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2021-05-02 15:28:46,548 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:28:46,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440362675] [2021-05-02 15:28:46,549 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:28:46,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608512414] [2021-05-02 15:28:46,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608512414] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:28:46,549 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:28:46,549 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-02 15:28:46,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359857082] [2021-05-02 15:28:46,549 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-02 15:28:46,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:28:46,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-02 15:28:46,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=230, Unknown=1, NotChecked=0, Total=272 [2021-05-02 15:28:46,550 INFO L87 Difference]: Start difference. First operand 138 states and 161 transitions. Second operand has 17 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 13 states have internal predecessors, (29), 7 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 7 states have call predecessors, (14), 6 states have call successors, (14) [2021-05-02 15:28:49,330 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 31 [2021-05-02 15:28:49,555 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 37 [2021-05-02 15:28:49,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:28:49,649 INFO L93 Difference]: Finished difference Result 144 states and 166 transitions. [2021-05-02 15:28:49,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-02 15:28:49,650 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 13 states have internal predecessors, (29), 7 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 7 states have call predecessors, (14), 6 states have call successors, (14) Word has length 86 [2021-05-02 15:28:49,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:28:49,651 INFO L225 Difference]: With dead ends: 144 [2021-05-02 15:28:49,651 INFO L226 Difference]: Without dead ends: 112 [2021-05-02 15:28:49,652 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 3220.0ms TimeCoverageRelationStatistics Valid=70, Invalid=391, Unknown=1, NotChecked=0, Total=462 [2021-05-02 15:28:49,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-05-02 15:28:49,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2021-05-02 15:28:49,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 67 states have (on average 1.1343283582089552) internal successors, (76), 69 states have internal predecessors, (76), 30 states have call successors, (30), 15 states have call predecessors, (30), 14 states have return successors, (28), 27 states have call predecessors, (28), 28 states have call successors, (28) [2021-05-02 15:28:49,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 134 transitions. [2021-05-02 15:28:49,676 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 134 transitions. Word has length 86 [2021-05-02 15:28:49,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:28:49,677 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 134 transitions. [2021-05-02 15:28:49,677 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 13 states have internal predecessors, (29), 7 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 7 states have call predecessors, (14), 6 states have call successors, (14) [2021-05-02 15:28:49,677 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 134 transitions. [2021-05-02 15:28:49,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-05-02 15:28:49,677 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:28:49,677 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:28:49,896 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-02 15:28:49,897 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:28:49,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:28:49,897 INFO L82 PathProgramCache]: Analyzing trace with hash 1094644914, now seen corresponding path program 3 times [2021-05-02 15:28:49,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:28:49,898 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539135705] [2021-05-02 15:28:49,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:28:49,911 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:28:49,911 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [56102385] [2021-05-02 15:28:49,911 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:28:50,003 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 15:28:50,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:28:50,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-02 15:28:50,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:28:52,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:52,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:28:52,252 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 82 proven. 8 refuted. 0 times theorem prover too weak. 191 trivial. 0 not checked. [2021-05-02 15:28:52,252 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:28:52,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539135705] [2021-05-02 15:28:52,252 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:28:52,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56102385] [2021-05-02 15:28:52,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56102385] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:28:52,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:28:52,253 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 15:28:52,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066461267] [2021-05-02 15:28:52,253 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 15:28:52,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:28:52,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 15:28:52,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=68, Unknown=1, NotChecked=0, Total=90 [2021-05-02 15:28:52,254 INFO L87 Difference]: Start difference. First operand 112 states and 134 transitions. Second operand has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 5 states have call predecessors, (10), 3 states have call successors, (10) [2021-05-02 15:29:16,650 WARN L205 SmtUtils]: Spent 4.08 s on a formula simplification that was a NOOP. DAG size: 23 [2021-05-02 15:29:20,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:29:20,476 INFO L93 Difference]: Finished difference Result 137 states and 160 transitions. [2021-05-02 15:29:20,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 15:29:20,477 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 5 states have call predecessors, (10), 3 states have call successors, (10) Word has length 89 [2021-05-02 15:29:20,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:29:20,478 INFO L225 Difference]: With dead ends: 137 [2021-05-02 15:29:20,478 INFO L226 Difference]: Without dead ends: 125 [2021-05-02 15:29:20,478 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 8214.3ms TimeCoverageRelationStatistics Valid=38, Invalid=116, Unknown=2, NotChecked=0, Total=156 [2021-05-02 15:29:20,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-05-02 15:29:20,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 123. [2021-05-02 15:29:20,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 74 states have (on average 1.1216216216216217) internal successors, (83), 77 states have internal predecessors, (83), 32 states have call successors, (32), 17 states have call predecessors, (32), 16 states have return successors, (30), 28 states have call predecessors, (30), 30 states have call successors, (30) [2021-05-02 15:29:20,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 145 transitions. [2021-05-02 15:29:20,494 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 145 transitions. Word has length 89 [2021-05-02 15:29:20,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:29:20,494 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 145 transitions. [2021-05-02 15:29:20,494 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 5 states have call predecessors, (10), 3 states have call successors, (10) [2021-05-02 15:29:20,494 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 145 transitions. [2021-05-02 15:29:20,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-05-02 15:29:20,495 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:29:20,495 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:29:20,708 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:29:20,709 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:29:20,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:29:20,709 INFO L82 PathProgramCache]: Analyzing trace with hash 1885636697, now seen corresponding path program 3 times [2021-05-02 15:29:20,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:29:20,710 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344675820] [2021-05-02 15:29:20,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:29:20,715 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:29:20,716 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2014924848] [2021-05-02 15:29:20,716 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:29:20,795 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 15:29:20,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:29:20,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-02 15:29:20,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:29:20,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:20,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:20,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:20,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:20,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:20,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:20,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:20,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:20,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:20,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:20,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:20,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:21,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:21,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:21,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:21,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:21,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:21,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:21,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:21,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:21,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:21,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:21,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:21,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:21,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:21,171 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 42 proven. 33 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-05-02 15:29:21,171 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:29:21,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344675820] [2021-05-02 15:29:21,172 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:29:21,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014924848] [2021-05-02 15:29:21,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014924848] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:29:21,172 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:29:21,172 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 15:29:21,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586811882] [2021-05-02 15:29:21,173 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 15:29:21,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:29:21,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 15:29:21,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-05-02 15:29:21,176 INFO L87 Difference]: Start difference. First operand 123 states and 145 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 11 states have internal predecessors, (30), 5 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2021-05-02 15:29:21,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:29:21,691 INFO L93 Difference]: Finished difference Result 166 states and 199 transitions. [2021-05-02 15:29:21,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 15:29:21,692 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 11 states have internal predecessors, (30), 5 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) Word has length 92 [2021-05-02 15:29:21,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:29:21,693 INFO L225 Difference]: With dead ends: 166 [2021-05-02 15:29:21,693 INFO L226 Difference]: Without dead ends: 139 [2021-05-02 15:29:21,694 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 189.3ms TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-05-02 15:29:21,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-05-02 15:29:21,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 137. [2021-05-02 15:29:21,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 85 states have (on average 1.1176470588235294) internal successors, (95), 87 states have internal predecessors, (95), 32 states have call successors, (32), 20 states have call predecessors, (32), 19 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) [2021-05-02 15:29:21,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 157 transitions. [2021-05-02 15:29:21,706 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 157 transitions. Word has length 92 [2021-05-02 15:29:21,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:29:21,706 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 157 transitions. [2021-05-02 15:29:21,706 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 11 states have internal predecessors, (30), 5 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 5 states have call predecessors, (15), 4 states have call successors, (15) [2021-05-02 15:29:21,706 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 157 transitions. [2021-05-02 15:29:21,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-05-02 15:29:21,707 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:29:21,707 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:29:21,920 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-05-02 15:29:21,921 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:29:21,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:29:21,921 INFO L82 PathProgramCache]: Analyzing trace with hash -278824083, now seen corresponding path program 4 times [2021-05-02 15:29:21,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:29:21,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343151736] [2021-05-02 15:29:21,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:29:21,930 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:29:21,930 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [87723507] [2021-05-02 15:29:21,930 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:29:21,997 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 15:29:21,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:29:21,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-02 15:29:22,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:29:22,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:22,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:22,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:22,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:22,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:22,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:22,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:22,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:22,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:22,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:22,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:22,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:22,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:22,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:22,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:22,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:22,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:22,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:22,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:22,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:22,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:22,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:22,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:22,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:22,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:22,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:22,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:22,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:22,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:22,478 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 41 proven. 40 refuted. 0 times theorem prover too weak. 237 trivial. 0 not checked. [2021-05-02 15:29:22,478 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:29:22,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343151736] [2021-05-02 15:29:22,478 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:29:22,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87723507] [2021-05-02 15:29:22,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87723507] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:29:22,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:29:22,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-02 15:29:22,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788157593] [2021-05-02 15:29:22,479 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 15:29:22,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:29:22,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 15:29:22,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-05-02 15:29:22,480 INFO L87 Difference]: Start difference. First operand 137 states and 157 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 8 states have call predecessors, (16), 7 states have call successors, (16) [2021-05-02 15:29:22,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:29:22,934 INFO L93 Difference]: Finished difference Result 153 states and 176 transitions. [2021-05-02 15:29:22,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 15:29:22,935 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 8 states have call predecessors, (16), 7 states have call successors, (16) Word has length 97 [2021-05-02 15:29:22,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:29:22,936 INFO L225 Difference]: With dead ends: 153 [2021-05-02 15:29:22,936 INFO L226 Difference]: Without dead ends: 145 [2021-05-02 15:29:22,937 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 305.7ms TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-05-02 15:29:22,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-05-02 15:29:22,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2021-05-02 15:29:22,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 90 states have (on average 1.1111111111111112) internal successors, (100), 92 states have internal predecessors, (100), 34 states have call successors, (34), 21 states have call predecessors, (34), 20 states have return successors, (32), 31 states have call predecessors, (32), 32 states have call successors, (32) [2021-05-02 15:29:22,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 166 transitions. [2021-05-02 15:29:22,949 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 166 transitions. Word has length 97 [2021-05-02 15:29:22,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:29:22,949 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 166 transitions. [2021-05-02 15:29:22,949 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 8 states have call predecessors, (16), 7 states have call successors, (16) [2021-05-02 15:29:22,950 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 166 transitions. [2021-05-02 15:29:22,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-05-02 15:29:22,950 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:29:22,951 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:29:23,174 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-05-02 15:29:23,174 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:29:23,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:29:23,175 INFO L82 PathProgramCache]: Analyzing trace with hash -367001023, now seen corresponding path program 5 times [2021-05-02 15:29:23,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:29:23,175 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882188397] [2021-05-02 15:29:23,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:29:23,181 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:29:23,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1049000891] [2021-05-02 15:29:23,182 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:29:23,415 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-05-02 15:29:23,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:29:23,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 52 conjunts are in the unsatisfiable core [2021-05-02 15:29:23,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:29:23,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:23,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:23,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:23,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:23,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:23,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:23,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:23,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:23,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:23,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:23,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:23,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:23,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:23,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:23,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:23,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:23,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:23,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:23,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:23,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:23,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:23,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:23,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:23,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:23,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:23,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:23,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:23,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:23,941 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 52 proven. 40 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked. [2021-05-02 15:29:23,941 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:29:23,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882188397] [2021-05-02 15:29:23,941 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:29:23,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049000891] [2021-05-02 15:29:23,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049000891] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:29:23,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:29:23,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-02 15:29:23,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303152791] [2021-05-02 15:29:23,942 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-02 15:29:23,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:29:23,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-02 15:29:23,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-05-02 15:29:23,943 INFO L87 Difference]: Start difference. First operand 145 states and 166 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 15 states have internal predecessors, (33), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) [2021-05-02 15:29:24,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:29:24,567 INFO L93 Difference]: Finished difference Result 180 states and 214 transitions. [2021-05-02 15:29:24,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-02 15:29:24,568 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 15 states have internal predecessors, (33), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) Word has length 105 [2021-05-02 15:29:24,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:29:24,570 INFO L225 Difference]: With dead ends: 180 [2021-05-02 15:29:24,570 INFO L226 Difference]: Without dead ends: 152 [2021-05-02 15:29:24,570 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 279.2ms TimeCoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-05-02 15:29:24,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-05-02 15:29:24,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 150. [2021-05-02 15:29:24,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 94 states have (on average 1.1063829787234043) internal successors, (104), 96 states have internal predecessors, (104), 34 states have call successors, (34), 22 states have call predecessors, (34), 21 states have return successors, (32), 31 states have call predecessors, (32), 32 states have call successors, (32) [2021-05-02 15:29:24,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 170 transitions. [2021-05-02 15:29:24,583 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 170 transitions. Word has length 105 [2021-05-02 15:29:24,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:29:24,584 INFO L480 AbstractCegarLoop]: Abstraction has 150 states and 170 transitions. [2021-05-02 15:29:24,584 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 15 states have internal predecessors, (33), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) [2021-05-02 15:29:24,584 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 170 transitions. [2021-05-02 15:29:24,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-05-02 15:29:24,585 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:29:24,585 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:29:24,809 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-05-02 15:29:24,810 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:29:24,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:29:24,810 INFO L82 PathProgramCache]: Analyzing trace with hash -2055944765, now seen corresponding path program 1 times [2021-05-02 15:29:24,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:29:24,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82589584] [2021-05-02 15:29:24,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:29:24,818 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:29:24,818 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1980175132] [2021-05-02 15:29:24,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:29:24,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:29:24,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 15:29:24,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:29:24,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:24,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:24,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:24,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:24,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:24,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:24,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:24,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:24,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:24,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:24,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:24,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:25,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:25,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:25,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:25,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:25,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:25,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:25,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:25,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:25,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:25,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:25,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:25,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:25,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:25,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:25,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:29:25,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:32:34,135 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:32:34,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82589584] [2021-05-02 15:32:34,136 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:32:34,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980175132] [2021-05-02 15:32:34,136 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: -1239324874 [2021-05-02 15:32:34,136 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:32:34,136 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-05-02 15:32:34,136 ERROR L212 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2021-05-02 15:32:34,136 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-02 15:32:34,352 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:32:34,376 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-05-02 15:32:34,377 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 03:32:34 BoogieIcfgContainer [2021-05-02 15:32:34,377 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 15:32:34,377 INFO L168 Benchmark]: Toolchain (without parser) took 241598.74 ms. Allocated memory was 196.1 MB in the beginning and 7.1 GB in the end (delta: 6.9 GB). Free memory was 160.4 MB in the beginning and 6.3 GB in the end (delta: -6.1 GB). Peak memory consumption was 4.9 GB. Max. memory is 8.0 GB. [2021-05-02 15:32:34,378 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 196.1 MB. Free memory is still 176.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 15:32:34,378 INFO L168 Benchmark]: CACSL2BoogieTranslator took 216.45 ms. Allocated memory is still 196.1 MB. Free memory was 160.2 MB in the beginning and 179.4 MB in the end (delta: -19.2 MB). Peak memory consumption was 13.2 MB. Max. memory is 8.0 GB. [2021-05-02 15:32:34,378 INFO L168 Benchmark]: Boogie Preprocessor took 59.00 ms. Allocated memory is still 196.1 MB. Free memory was 179.4 MB in the beginning and 178.3 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 15:32:34,378 INFO L168 Benchmark]: RCFGBuilder took 392.23 ms. Allocated memory is still 196.1 MB. Free memory was 177.8 MB in the beginning and 161.5 MB in the end (delta: 16.3 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-05-02 15:32:34,378 INFO L168 Benchmark]: TraceAbstraction took 240923.21 ms. Allocated memory was 196.1 MB in the beginning and 7.1 GB in the end (delta: 6.9 GB). Free memory was 161.0 MB in the beginning and 6.3 GB in the end (delta: -6.1 GB). Peak memory consumption was 4.9 GB. Max. memory is 8.0 GB. [2021-05-02 15:32:34,378 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 196.1 MB. Free memory is still 176.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 216.45 ms. Allocated memory is still 196.1 MB. Free memory was 160.2 MB in the beginning and 179.4 MB in the end (delta: -19.2 MB). Peak memory consumption was 13.2 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 59.00 ms. Allocated memory is still 196.1 MB. Free memory was 179.4 MB in the beginning and 178.3 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 392.23 ms. Allocated memory is still 196.1 MB. Free memory was 177.8 MB in the beginning and 161.5 MB in the end (delta: 16.3 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 240923.21 ms. Allocated memory was 196.1 MB in the beginning and 7.1 GB in the end (delta: 6.9 GB). Free memory was 161.0 MB in the beginning and 6.3 GB in the end (delta: -6.1 GB). Peak memory consumption was 4.9 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 17]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L23] unsigned int A, B; [L24] long long r, d, p, q; [L25] A = __VERIFIER_nondet_unsigned_int() [L26] CALL assume_abort_if_not(A>=0 && A<=20) [L12] COND FALSE !(!cond) [L26] RET assume_abort_if_not(A>=0 && A<=20) [L27] B = __VERIFIER_nondet_unsigned_int() [L28] CALL assume_abort_if_not(B>=0 && B<=20) [L12] COND FALSE !(!cond) [L28] RET assume_abort_if_not(B>=0 && B<=20) [L29] CALL assume_abort_if_not(B >= 1) [L12] COND FALSE !(!cond) [L29] RET assume_abort_if_not(B >= 1) [L31] r = A [L32] d = B [L33] p = 1 [L34] q = 0 [L36] COND TRUE 1 [L37] CALL __VERIFIER_assert(q == 0) [L15] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(q == 0) [L38] CALL __VERIFIER_assert(r == A) [L15] COND FALSE !(!(cond)) [L38] RET __VERIFIER_assert(r == A) [L39] CALL __VERIFIER_assert(d == B * p) [L15] COND FALSE !(!(cond)) [L39] RET __VERIFIER_assert(d == B * p) [L40] COND FALSE !(!(r >= d)) [L42] d = 2 * d [L43] p = 2 * p [L36] COND TRUE 1 [L37] CALL __VERIFIER_assert(q == 0) [L15] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(q == 0) [L38] CALL __VERIFIER_assert(r == A) [L15] COND FALSE !(!(cond)) [L38] RET __VERIFIER_assert(r == A) [L39] CALL __VERIFIER_assert(d == B * p) [L15] COND FALSE !(!(cond)) [L39] RET __VERIFIER_assert(d == B * p) [L40] COND FALSE !(!(r >= d)) [L42] d = 2 * d [L43] p = 2 * p [L36] COND TRUE 1 [L37] CALL __VERIFIER_assert(q == 0) [L15] COND FALSE !(!(cond)) [L37] RET __VERIFIER_assert(q == 0) [L38] CALL __VERIFIER_assert(r == A) [L15] COND FALSE !(!(cond)) [L38] RET __VERIFIER_assert(r == A) [L39] CALL __VERIFIER_assert(d == B * p) [L15] COND FALSE !(!(cond)) [L39] RET __VERIFIER_assert(d == B * p) [L40] COND TRUE !(r >= d) [L46] COND TRUE 1 [L47] CALL __VERIFIER_assert(A == q*B + r) [L15] COND FALSE !(!(cond)) [L47] RET __VERIFIER_assert(A == q*B + r) [L48] CALL __VERIFIER_assert(d == B*p) [L15] COND FALSE !(!(cond)) [L48] RET __VERIFIER_assert(d == B*p) [L50] COND FALSE !(!(p != 1)) [L52] d = d / 2 [L53] p = p / 2 [L54] COND FALSE !(r >= d) [L46] COND TRUE 1 [L47] CALL __VERIFIER_assert(A == q*B + r) [L15] COND FALSE !(!(cond)) [L47] RET __VERIFIER_assert(A == q*B + r) [L48] CALL __VERIFIER_assert(d == B*p) [L15] COND FALSE !(!(cond)) [L48] RET __VERIFIER_assert(d == B*p) [L50] COND FALSE !(!(p != 1)) [L52] d = d / 2 [L53] p = p / 2 [L54] COND TRUE r >= d [L55] r = r - d [L56] q = q + p [L46] COND TRUE 1 [L47] CALL __VERIFIER_assert(A == q*B + r) [L15] COND TRUE !(cond) [L17] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 41 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 240846.1ms, OverallIterations: 17, TraceHistogramMax: 14, EmptinessCheckTime: 30.3ms, AutomataDifference: 35962.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 12.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 594 SDtfs, 514 SDslu, 2946 SDs, 0 SdLazy, 4171 SolverSat, 448 SolverUnsat, 11 SolverUnknown, 0 SolverNotchecked, 27080.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1051 GetRequests, 858 SyntacticMatches, 1 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 13642.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=150occurred in iteration=16, InterpolantAutomatonStates: 172, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 264.3ms AutomataMinimizationTime, 16 MinimizatonAttempts, 23 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 152.8ms SsaConstructionTime, 678.9ms SatisfiabilityAnalysisTime, 10774.8ms InterpolantComputationTime, 1064 NumberOfCodeBlocks, 1000 NumberOfCodeBlocksAsserted, 31 NumberOfCheckSat, 1048 ConstructedInterpolants, 0 QuantifiedInterpolants, 6011 SizeOfPredicates, 63 NumberOfNonLiveVariables, 2612 ConjunctsInSsa, 403 ConjunctsInUnsatCore, 16 InterpolantComputations, 4 PerfectInterpolantSequences, 2187/2379 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...