/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/egcd3-ll_valuebound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 15:01:05,706 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 15:01:05,708 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 15:01:05,744 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 15:01:05,764 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 15:01:05,766 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 15:01:05,767 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 15:01:05,769 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 15:01:05,771 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 15:01:05,772 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 15:01:05,774 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 15:01:05,777 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 15:01:05,778 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 15:01:05,779 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 15:01:05,780 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 15:01:05,781 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 15:01:05,783 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 15:01:05,789 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 15:01:05,790 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 15:01:05,790 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 15:01:05,791 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 15:01:05,811 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 15:01:05,811 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 15:01:05,812 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 15:01:05,813 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 15:01:05,813 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 15:01:05,813 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 15:01:05,813 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 15:01:05,813 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 15:01:05,813 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 15:01:05,813 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 15:01:05,814 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 15:01:05,814 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 15:01:05,814 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 15:01:05,814 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 15:01:05,814 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 15:01:05,814 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 15:01:05,814 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 15:01:05,815 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 15:01:05,815 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 15:01:05,815 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 15:01:05,815 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 15:01:05,815 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 15:01:05,815 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 15:01:05,815 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 15:01:05,815 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 15:01:05,816 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 15:01:05,816 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 15:01:05,816 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 15:01:05,816 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 15:01:06,103 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 15:01:06,121 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 15:01:06,123 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 15:01:06,124 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 15:01:06,124 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 15:01:06,125 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound50.c [2021-05-02 15:01:06,198 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/52d75d7f2/ea58a59fdf674df0a5b619a61aab515e/FLAG9888af499 [2021-05-02 15:01:06,841 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 15:01:06,841 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound50.c [2021-05-02 15:01:06,854 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/52d75d7f2/ea58a59fdf674df0a5b619a61aab515e/FLAG9888af499 [2021-05-02 15:01:07,095 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/52d75d7f2/ea58a59fdf674df0a5b619a61aab515e [2021-05-02 15:01:07,103 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 15:01:07,105 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 15:01:07,108 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 15:01:07,109 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 15:01:07,112 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 15:01:07,113 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 03:01:07" (1/1) ... [2021-05-02 15:01:07,114 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21e3bef4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:01:07, skipping insertion in model container [2021-05-02 15:01:07,114 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 03:01:07" (1/1) ... [2021-05-02 15:01:07,120 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 15:01:07,137 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 15:01:07,282 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/egcd3-ll_valuebound50.c[490,503] [2021-05-02 15:01:07,297 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 15:01:07,304 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 15:01:07,350 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/egcd3-ll_valuebound50.c[490,503] [2021-05-02 15:01:07,369 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 15:01:07,380 INFO L208 MainTranslator]: Completed translation [2021-05-02 15:01:07,387 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:01:07 WrapperNode [2021-05-02 15:01:07,387 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 15:01:07,388 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 15:01:07,388 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 15:01:07,390 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 15:01:07,399 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:01:07" (1/1) ... [2021-05-02 15:01:07,399 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:01:07" (1/1) ... [2021-05-02 15:01:07,412 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:01:07" (1/1) ... [2021-05-02 15:01:07,413 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:01:07" (1/1) ... [2021-05-02 15:01:07,424 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:01:07" (1/1) ... [2021-05-02 15:01:07,427 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:01:07" (1/1) ... [2021-05-02 15:01:07,428 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:01:07" (1/1) ... [2021-05-02 15:01:07,430 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 15:01:07,431 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 15:01:07,431 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 15:01:07,431 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 15:01:07,431 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:01:07" (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 15:01:07,505 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 15:01:07,505 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 15:01:07,506 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 15:01:07,506 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 15:01:07,506 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 15:01:07,506 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 15:01:07,507 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 15:01:07,507 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 15:01:07,507 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 15:01:07,507 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 15:01:07,508 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 15:01:07,508 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 15:01:07,508 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 15:01:07,508 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 15:01:07,509 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 15:01:07,509 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 15:01:07,509 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 15:01:07,509 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 15:01:07,509 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 15:01:07,510 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 15:01:07,853 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 15:01:07,854 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-05-02 15:01:07,855 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 03:01:07 BoogieIcfgContainer [2021-05-02 15:01:07,855 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 15:01:07,856 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 15:01:07,856 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 15:01:07,859 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 15:01:07,859 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 03:01:07" (1/3) ... [2021-05-02 15:01:07,859 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6128aafe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 03:01:07, skipping insertion in model container [2021-05-02 15:01:07,859 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:01:07" (2/3) ... [2021-05-02 15:01:07,860 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6128aafe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 03:01:07, skipping insertion in model container [2021-05-02 15:01:07,860 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 03:01:07" (3/3) ... [2021-05-02 15:01:07,861 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_valuebound50.c [2021-05-02 15:01:07,866 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 15:01:07,868 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 15:01:07,882 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 15:01:07,901 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 15:01:07,901 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 15:01:07,901 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 15:01:07,902 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 15:01:07,902 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 15:01:07,902 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 15:01:07,902 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 15:01:07,902 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 15:01:07,914 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 15:01:07,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 15:01:07,918 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:01:07,918 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:01:07,919 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:01:07,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:01:07,923 INFO L82 PathProgramCache]: Analyzing trace with hash 1237885594, now seen corresponding path program 1 times [2021-05-02 15:01:07,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:01:07,934 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820263310] [2021-05-02 15:01:07,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:01:08,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:01:08,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 15:01:08,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:01:08,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 15:01:08,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:01:08,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 15:01:08,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:01:08,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 15:01:08,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:01:08,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-02 15:01:08,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:01:08,238 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-02 15:01:08,238 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:01:08,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820263310] [2021-05-02 15:01:08,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820263310] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:01:08,239 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:01:08,240 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 15:01:08,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749581339] [2021-05-02 15:01:08,246 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 15:01:08,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:01:08,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 15:01:08,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 15:01:08,259 INFO L87 Difference]: Start difference. First operand has 40 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 24 states have internal predecessors, (35), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 15:01:08,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:01:08,450 INFO L93 Difference]: Finished difference Result 73 states and 115 transitions. [2021-05-02 15:01:08,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 15:01:08,453 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-05-02 15:01:08,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:01:08,458 INFO L225 Difference]: With dead ends: 73 [2021-05-02 15:01:08,459 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 15:01:08,462 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 56.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 15:01:08,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 15:01:08,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-02 15:01:08,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 15:01:08,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2021-05-02 15:01:08,516 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 33 [2021-05-02 15:01:08,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:01:08,517 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2021-05-02 15:01:08,517 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 15:01:08,517 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2021-05-02 15:01:08,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-02 15:01:08,518 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:01:08,518 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:01:08,519 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 15:01:08,519 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:01:08,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:01:08,519 INFO L82 PathProgramCache]: Analyzing trace with hash 1569470122, now seen corresponding path program 1 times [2021-05-02 15:01:08,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:01:08,520 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982285976] [2021-05-02 15:01:08,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:01:08,545 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:01:08,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [324091104] [2021-05-02 15:01:08,546 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 15:01:08,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:01:08,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 15:01:08,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:01:08,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:08,745 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 15:01:08,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:01:08,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982285976] [2021-05-02 15:01:08,746 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:01:08,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324091104] [2021-05-02 15:01:08,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324091104] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:01:08,746 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:01:08,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 15:01:08,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808617626] [2021-05-02 15:01:08,748 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 15:01:08,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:01:08,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 15:01:08,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 15:01:08,749 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-02 15:01:08,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:01:08,832 INFO L93 Difference]: Finished difference Result 54 states and 69 transitions. [2021-05-02 15:01:08,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 15:01:08,833 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 34 [2021-05-02 15:01:08,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:01:08,834 INFO L225 Difference]: With dead ends: 54 [2021-05-02 15:01:08,834 INFO L226 Difference]: Without dead ends: 47 [2021-05-02 15:01:08,835 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 34.1ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-02 15:01:08,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-05-02 15:01:08,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 37. [2021-05-02 15:01:08,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 15:01:08,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2021-05-02 15:01:08,845 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 34 [2021-05-02 15:01:08,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:01:08,845 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2021-05-02 15:01:08,846 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-02 15:01:08,846 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2021-05-02 15:01:08,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-02 15:01:08,847 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:01:08,847 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:01:09,047 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 15:01:09,048 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:01:09,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:01:09,048 INFO L82 PathProgramCache]: Analyzing trace with hash 1443363578, now seen corresponding path program 1 times [2021-05-02 15:01:09,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:01:09,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116714838] [2021-05-02 15:01:09,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:01:09,060 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:01:09,060 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1748133526] [2021-05-02 15:01:09,060 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 15:01:09,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:01:09,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-02 15:01:09,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:01:09,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:09,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:09,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:09,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:09,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:09,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:09,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:09,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:09,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:09,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:09,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:09,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:09,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:09,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:09,366 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 15:01:09,367 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:01:09,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116714838] [2021-05-02 15:01:09,367 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:01:09,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748133526] [2021-05-02 15:01:09,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748133526] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:01:09,367 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:01:09,367 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 15:01:09,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176997859] [2021-05-02 15:01:09,368 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 15:01:09,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:01:09,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 15:01:09,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:01:09,369 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 15:01:09,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:01:09,523 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2021-05-02 15:01:09,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 15:01:09,524 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 37 [2021-05-02 15:01:09,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:01:09,527 INFO L225 Difference]: With dead ends: 53 [2021-05-02 15:01:09,528 INFO L226 Difference]: Without dead ends: 51 [2021-05-02 15:01:09,529 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 86.3ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-02 15:01:09,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-05-02 15:01:09,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2021-05-02 15:01:09,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 30 states have (on average 1.2) internal successors, (36), 31 states have internal predecessors, (36), 15 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 15:01:09,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 64 transitions. [2021-05-02 15:01:09,553 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 64 transitions. Word has length 37 [2021-05-02 15:01:09,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:01:09,553 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 64 transitions. [2021-05-02 15:01:09,553 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 15:01:09,553 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 64 transitions. [2021-05-02 15:01:09,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-02 15:01:09,554 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:01:09,554 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:01:09,778 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:01:09,779 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:01:09,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:01:09,779 INFO L82 PathProgramCache]: Analyzing trace with hash 584996456, now seen corresponding path program 1 times [2021-05-02 15:01:09,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:01:09,780 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721553140] [2021-05-02 15:01:09,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:01:09,792 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:01:09,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1673587421] [2021-05-02 15:01:09,793 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 15:01:09,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:01:09,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 15:01:09,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:01:09,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:09,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:09,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:09,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:09,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:10,020 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 15:01:10,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:01:10,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721553140] [2021-05-02 15:01:10,021 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:01:10,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673587421] [2021-05-02 15:01:10,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673587421] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:01:10,021 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:01:10,021 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 15:01:10,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536756583] [2021-05-02 15:01:10,022 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 15:01:10,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:01:10,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 15:01:10,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 15:01:10,023 INFO L87 Difference]: Start difference. First operand 50 states and 64 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 15:01:10,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:01:10,275 INFO L93 Difference]: Finished difference Result 103 states and 143 transitions. [2021-05-02 15:01:10,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 15:01:10,276 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2021-05-02 15:01:10,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:01:10,288 INFO L225 Difference]: With dead ends: 103 [2021-05-02 15:01:10,288 INFO L226 Difference]: Without dead ends: 96 [2021-05-02 15:01:10,289 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 100.5ms TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-05-02 15:01:10,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-05-02 15:01:10,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 71. [2021-05-02 15:01:10,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 47 states have (on average 1.2553191489361701) internal successors, (59), 48 states have internal predecessors, (59), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-02 15:01:10,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 95 transitions. [2021-05-02 15:01:10,306 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 95 transitions. Word has length 39 [2021-05-02 15:01:10,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:01:10,307 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 95 transitions. [2021-05-02 15:01:10,307 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 15:01:10,307 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 95 transitions. [2021-05-02 15:01:10,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-02 15:01:10,308 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:01:10,308 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:01:10,512 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:01:10,513 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:01:10,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:01:10,514 INFO L82 PathProgramCache]: Analyzing trace with hash -1286298951, now seen corresponding path program 1 times [2021-05-02 15:01:10,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:01:10,514 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997259271] [2021-05-02 15:01:10,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:01:10,525 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:01:10,526 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [909314261] [2021-05-02 15:01:10,526 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 15:01:10,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:01:10,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 15:01:10,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:01:10,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:10,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:10,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:10,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:10,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:10,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:10,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:10,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:10,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:10,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:10,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:10,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:10,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:10,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:10,781 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 15:01:10,781 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:01:10,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997259271] [2021-05-02 15:01:10,781 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:01:10,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909314261] [2021-05-02 15:01:10,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909314261] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:01:10,782 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:01:10,782 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 15:01:10,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836189461] [2021-05-02 15:01:10,782 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 15:01:10,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:01:10,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 15:01:10,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-02 15:01:10,783 INFO L87 Difference]: Start difference. First operand 71 states and 95 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 15:01:10,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:01:10,915 INFO L93 Difference]: Finished difference Result 79 states and 102 transitions. [2021-05-02 15:01:10,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 15:01:10,916 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 42 [2021-05-02 15:01:10,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:01:10,917 INFO L225 Difference]: With dead ends: 79 [2021-05-02 15:01:10,917 INFO L226 Difference]: Without dead ends: 77 [2021-05-02 15:01:10,917 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 66.7ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 15:01:10,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-05-02 15:01:10,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 75. [2021-05-02 15:01:10,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 50 states have (on average 1.24) internal successors, (62), 51 states have internal predecessors, (62), 19 states have call successors, (19), 6 states have call predecessors, (19), 5 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-02 15:01:10,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 98 transitions. [2021-05-02 15:01:10,946 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 98 transitions. Word has length 42 [2021-05-02 15:01:10,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:01:10,946 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 98 transitions. [2021-05-02 15:01:10,946 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 15:01:10,947 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 98 transitions. [2021-05-02 15:01:10,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-02 15:01:10,948 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:01:10,948 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 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, 1] [2021-05-02 15:01:11,169 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:01:11,169 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:01:11,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:01:11,170 INFO L82 PathProgramCache]: Analyzing trace with hash -974923140, now seen corresponding path program 1 times [2021-05-02 15:01:11,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:01:11,170 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389947950] [2021-05-02 15:01:11,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:01:11,181 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:01:11,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [700950503] [2021-05-02 15:01:11,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:01:11,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:01:11,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-02 15:01:11,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:01:11,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:11,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:11,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:11,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:11,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:11,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:11,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:11,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:11,432 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 15:01:11,433 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:01:11,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389947950] [2021-05-02 15:01:11,433 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:01:11,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700950503] [2021-05-02 15:01:11,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700950503] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:01:11,433 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:01:11,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 15:01:11,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664311549] [2021-05-02 15:01:11,434 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 15:01:11,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:01:11,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 15:01:11,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:01:11,435 INFO L87 Difference]: Start difference. First operand 75 states and 98 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 15:01:11,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:01:11,642 INFO L93 Difference]: Finished difference Result 111 states and 147 transitions. [2021-05-02 15:01:11,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 15:01:11,643 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 42 [2021-05-02 15:01:11,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:01:11,646 INFO L225 Difference]: With dead ends: 111 [2021-05-02 15:01:11,646 INFO L226 Difference]: Without dead ends: 109 [2021-05-02 15:01:11,647 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 82.9ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-02 15:01:11,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-05-02 15:01:11,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 105. [2021-05-02 15:01:11,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 71 states have (on average 1.2535211267605635) internal successors, (89), 72 states have internal predecessors, (89), 27 states have call successors, (27), 7 states have call predecessors, (27), 6 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2021-05-02 15:01:11,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 141 transitions. [2021-05-02 15:01:11,672 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 141 transitions. Word has length 42 [2021-05-02 15:01:11,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:01:11,673 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 141 transitions. [2021-05-02 15:01:11,673 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 15:01:11,673 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 141 transitions. [2021-05-02 15:01:11,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-02 15:01:11,674 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:01:11,674 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:01:11,887 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 15:01:11,888 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:01:11,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:01:11,888 INFO L82 PathProgramCache]: Analyzing trace with hash 81990170, now seen corresponding path program 1 times [2021-05-02 15:01:11,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:01:11,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915807324] [2021-05-02 15:01:11,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:01:11,902 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:01:11,902 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1131943926] [2021-05-02 15:01:11,902 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 15:01:11,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:01:11,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 15:01:11,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:01:11,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:12,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:12,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:12,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:12,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:12,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:12,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:12,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:12,095 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 15:01:12,095 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:01:12,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915807324] [2021-05-02 15:01:12,096 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:01:12,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131943926] [2021-05-02 15:01:12,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131943926] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:01:12,096 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:01:12,096 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 15:01:12,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923199475] [2021-05-02 15:01:12,096 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 15:01:12,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:01:12,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 15:01:12,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-02 15:01:12,097 INFO L87 Difference]: Start difference. First operand 105 states and 141 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-02 15:01:12,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:01:12,314 INFO L93 Difference]: Finished difference Result 118 states and 158 transitions. [2021-05-02 15:01:12,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 15:01:12,314 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2021-05-02 15:01:12,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:01:12,316 INFO L225 Difference]: With dead ends: 118 [2021-05-02 15:01:12,316 INFO L226 Difference]: Without dead ends: 116 [2021-05-02 15:01:12,317 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 77.5ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-02 15:01:12,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-05-02 15:01:12,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2021-05-02 15:01:12,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 76 states have (on average 1.25) internal successors, (95), 77 states have internal predecessors, (95), 31 states have call successors, (31), 8 states have call predecessors, (31), 7 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2021-05-02 15:01:12,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 155 transitions. [2021-05-02 15:01:12,337 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 155 transitions. Word has length 47 [2021-05-02 15:01:12,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:01:12,338 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 155 transitions. [2021-05-02 15:01:12,339 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-02 15:01:12,339 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 155 transitions. [2021-05-02 15:01:12,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-02 15:01:12,342 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:01:12,343 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:01:12,567 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:01:12,567 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:01:12,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:01:12,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1524769911, now seen corresponding path program 1 times [2021-05-02 15:01:12,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:01:12,568 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562174972] [2021-05-02 15:01:12,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:01:12,593 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:01:12,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1902155607] [2021-05-02 15:01:12,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:01:12,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:01:12,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-02 15:01:12,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:01:12,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:12,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:12,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:12,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:12,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:12,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:12,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:12,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:12,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:12,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:12,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:12,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:12,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:12,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:12,906 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 15:01:12,907 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:01:12,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562174972] [2021-05-02 15:01:12,907 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:01:12,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902155607] [2021-05-02 15:01:12,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902155607] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:01:12,907 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:01:12,907 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 15:01:12,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940682645] [2021-05-02 15:01:12,908 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 15:01:12,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:01:12,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 15:01:12,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 15:01:12,908 INFO L87 Difference]: Start difference. First operand 115 states and 155 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 15:01:13,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:01:13,135 INFO L93 Difference]: Finished difference Result 124 states and 163 transitions. [2021-05-02 15:01:13,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 15:01:13,136 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 47 [2021-05-02 15:01:13,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:01:13,139 INFO L225 Difference]: With dead ends: 124 [2021-05-02 15:01:13,139 INFO L226 Difference]: Without dead ends: 122 [2021-05-02 15:01:13,139 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 129.2ms TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-05-02 15:01:13,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-05-02 15:01:13,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 119. [2021-05-02 15:01:13,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 79 states have (on average 1.240506329113924) internal successors, (98), 80 states have internal predecessors, (98), 31 states have call successors, (31), 9 states have call predecessors, (31), 8 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2021-05-02 15:01:13,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 158 transitions. [2021-05-02 15:01:13,174 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 158 transitions. Word has length 47 [2021-05-02 15:01:13,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:01:13,175 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 158 transitions. [2021-05-02 15:01:13,175 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 15:01:13,175 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 158 transitions. [2021-05-02 15:01:13,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-02 15:01:13,176 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:01:13,176 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 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 15:01:13,389 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:01:13,389 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:01:13,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:01:13,389 INFO L82 PathProgramCache]: Analyzing trace with hash 1836145722, now seen corresponding path program 2 times [2021-05-02 15:01:13,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:01:13,390 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495334365] [2021-05-02 15:01:13,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:01:13,399 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:01:13,399 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [40471990] [2021-05-02 15:01:13,399 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 15:01:13,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 15:01:13,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:01:13,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 15:01:13,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:01:13,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:13,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:13,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:13,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:13,545 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-02 15:01:13,545 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:01:13,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495334365] [2021-05-02 15:01:13,545 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:01:13,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40471990] [2021-05-02 15:01:13,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40471990] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:01:13,546 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:01:13,546 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 15:01:13,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475957839] [2021-05-02 15:01:13,546 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 15:01:13,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:01:13,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 15:01:13,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-02 15:01:13,547 INFO L87 Difference]: Start difference. First operand 119 states and 158 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-02 15:01:13,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:01:13,632 INFO L93 Difference]: Finished difference Result 168 states and 232 transitions. [2021-05-02 15:01:13,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 15:01:13,632 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 47 [2021-05-02 15:01:13,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:01:13,633 INFO L225 Difference]: With dead ends: 168 [2021-05-02 15:01:13,634 INFO L226 Difference]: Without dead ends: 130 [2021-05-02 15:01:13,634 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 25.0ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-02 15:01:13,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-05-02 15:01:13,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 104. [2021-05-02 15:01:13,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 68 states have (on average 1.1911764705882353) internal successors, (81), 69 states have internal predecessors, (81), 27 states have call successors, (27), 9 states have call predecessors, (27), 8 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2021-05-02 15:01:13,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 133 transitions. [2021-05-02 15:01:13,648 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 133 transitions. Word has length 47 [2021-05-02 15:01:13,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:01:13,648 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 133 transitions. [2021-05-02 15:01:13,648 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-02 15:01:13,648 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 133 transitions. [2021-05-02 15:01:13,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-02 15:01:13,649 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:01:13,649 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:01:13,872 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-02 15:01:13,873 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:01:13,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:01:13,873 INFO L82 PathProgramCache]: Analyzing trace with hash -1952108775, now seen corresponding path program 1 times [2021-05-02 15:01:13,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:01:13,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114395803] [2021-05-02 15:01:13,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:01:13,882 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:01:13,882 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1383591922] [2021-05-02 15:01:13,882 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 15:01:13,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:01:13,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 15:01:13,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:01:13,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:14,055 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-05-02 15:01:14,056 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:01:14,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114395803] [2021-05-02 15:01:14,056 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:01:14,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383591922] [2021-05-02 15:01:14,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383591922] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:01:14,056 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:01:14,056 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 15:01:14,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186031358] [2021-05-02 15:01:14,058 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 15:01:14,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:01:14,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 15:01:14,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 15:01:14,059 INFO L87 Difference]: Start difference. First operand 104 states and 133 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-05-02 15:01:14,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:01:14,166 INFO L93 Difference]: Finished difference Result 154 states and 211 transitions. [2021-05-02 15:01:14,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 15:01:14,166 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 52 [2021-05-02 15:01:14,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:01:14,168 INFO L225 Difference]: With dead ends: 154 [2021-05-02 15:01:14,168 INFO L226 Difference]: Without dead ends: 152 [2021-05-02 15:01:14,168 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 34.2ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-02 15:01:14,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-05-02 15:01:14,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 133. [2021-05-02 15:01:14,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 76 states have (on average 1.1710526315789473) internal successors, (89), 82 states have internal predecessors, (89), 47 states have call successors, (47), 10 states have call predecessors, (47), 9 states have return successors, (45), 40 states have call predecessors, (45), 45 states have call successors, (45) [2021-05-02 15:01:14,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 181 transitions. [2021-05-02 15:01:14,188 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 181 transitions. Word has length 52 [2021-05-02 15:01:14,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:01:14,188 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 181 transitions. [2021-05-02 15:01:14,189 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-05-02 15:01:14,189 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 181 transitions. [2021-05-02 15:01:14,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-02 15:01:14,189 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:01:14,189 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:01:14,409 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:01:14,409 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:01:14,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:01:14,410 INFO L82 PathProgramCache]: Analyzing trace with hash 1926690588, now seen corresponding path program 1 times [2021-05-02 15:01:14,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:01:14,410 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695111751] [2021-05-02 15:01:14,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:01:14,421 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:01:14,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1643910773] [2021-05-02 15:01:14,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 15:01:14,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:01:14,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 15:01:14,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:01:14,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:14,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:14,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:14,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:14,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:14,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:14,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:14,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:14,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:14,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:14,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:14,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:14,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:14,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:14,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:14,705 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 15:01:14,705 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:01:14,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695111751] [2021-05-02 15:01:14,705 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:01:14,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643910773] [2021-05-02 15:01:14,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643910773] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:01:14,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:01:14,706 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 15:01:14,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557223936] [2021-05-02 15:01:14,706 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 15:01:14,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:01:14,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 15:01:14,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-05-02 15:01:14,707 INFO L87 Difference]: Start difference. First operand 133 states and 181 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-02 15:01:15,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:01:15,011 INFO L93 Difference]: Finished difference Result 185 states and 261 transitions. [2021-05-02 15:01:15,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 15:01:15,011 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 52 [2021-05-02 15:01:15,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:01:15,014 INFO L225 Difference]: With dead ends: 185 [2021-05-02 15:01:15,014 INFO L226 Difference]: Without dead ends: 183 [2021-05-02 15:01:15,015 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 142.3ms TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-05-02 15:01:15,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-05-02 15:01:15,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 148. [2021-05-02 15:01:15,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 82 states have (on average 1.170731707317073) internal successors, (96), 89 states have internal predecessors, (96), 55 states have call successors, (55), 11 states have call predecessors, (55), 10 states have return successors, (53), 47 states have call predecessors, (53), 53 states have call successors, (53) [2021-05-02 15:01:15,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 204 transitions. [2021-05-02 15:01:15,038 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 204 transitions. Word has length 52 [2021-05-02 15:01:15,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:01:15,038 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 204 transitions. [2021-05-02 15:01:15,038 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-02 15:01:15,039 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 204 transitions. [2021-05-02 15:01:15,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-05-02 15:01:15,039 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:01:15,039 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:01:15,244 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:01:15,245 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:01:15,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:01:15,245 INFO L82 PathProgramCache]: Analyzing trace with hash 188363668, now seen corresponding path program 1 times [2021-05-02 15:01:15,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:01:15,246 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769016001] [2021-05-02 15:01:15,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:01:15,253 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:01:15,254 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1988784949] [2021-05-02 15:01:15,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 15:01:15,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:01:15,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 60 conjunts are in the unsatisfiable core [2021-05-02 15:01:15,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:01:15,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:15,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:15,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:15,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:15,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:15,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:15,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:15,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:15,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:15,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:15,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:15,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:15,717 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-05-02 15:01:15,718 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:01:15,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769016001] [2021-05-02 15:01:15,718 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:01:15,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988784949] [2021-05-02 15:01:15,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988784949] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:01:15,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:01:15,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-02 15:01:15,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653180679] [2021-05-02 15:01:15,719 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 15:01:15,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:01:15,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 15:01:15,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-05-02 15:01:15,719 INFO L87 Difference]: Start difference. First operand 148 states and 204 transitions. Second operand has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-02 15:01:16,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:01:16,350 INFO L93 Difference]: Finished difference Result 261 states and 355 transitions. [2021-05-02 15:01:16,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 15:01:16,350 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 64 [2021-05-02 15:01:16,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:01:16,352 INFO L225 Difference]: With dead ends: 261 [2021-05-02 15:01:16,352 INFO L226 Difference]: Without dead ends: 185 [2021-05-02 15:01:16,353 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 445.9ms TimeCoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-05-02 15:01:16,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-05-02 15:01:16,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 183. [2021-05-02 15:01:16,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 106 states have (on average 1.1603773584905661) internal successors, (123), 113 states have internal predecessors, (123), 63 states have call successors, (63), 14 states have call predecessors, (63), 13 states have return successors, (61), 55 states have call predecessors, (61), 61 states have call successors, (61) [2021-05-02 15:01:16,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 247 transitions. [2021-05-02 15:01:16,378 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 247 transitions. Word has length 64 [2021-05-02 15:01:16,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:01:16,378 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 247 transitions. [2021-05-02 15:01:16,379 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-02 15:01:16,379 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 247 transitions. [2021-05-02 15:01:16,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-02 15:01:16,380 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:01:16,380 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:01:16,592 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-02 15:01:16,593 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:01:16,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:01:16,593 INFO L82 PathProgramCache]: Analyzing trace with hash -368004398, now seen corresponding path program 2 times [2021-05-02 15:01:16,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:01:16,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58658643] [2021-05-02 15:01:16,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:01:16,614 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:01:16,614 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1422216044] [2021-05-02 15:01:16,614 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 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 15:01:16,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 15:01:16,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:01:16,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-02 15:01:16,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:01:16,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:16,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:16,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:16,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:16,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:16,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:16,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:16,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:16,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:16,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:16,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:16,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:16,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:16,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:16,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:16,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:16,824 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-05-02 15:01:16,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:01:16,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58658643] [2021-05-02 15:01:16,824 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:01:16,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422216044] [2021-05-02 15:01:16,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422216044] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:01:16,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:01:16,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 15:01:16,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955330594] [2021-05-02 15:01:16,825 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 15:01:16,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:01:16,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 15:01:16,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 15:01:16,826 INFO L87 Difference]: Start difference. First operand 183 states and 247 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-05-02 15:01:17,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:01:17,153 INFO L93 Difference]: Finished difference Result 327 states and 483 transitions. [2021-05-02 15:01:17,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 15:01:17,154 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 69 [2021-05-02 15:01:17,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:01:17,157 INFO L225 Difference]: With dead ends: 327 [2021-05-02 15:01:17,157 INFO L226 Difference]: Without dead ends: 320 [2021-05-02 15:01:17,158 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 129.6ms TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2021-05-02 15:01:17,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2021-05-02 15:01:17,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 217. [2021-05-02 15:01:17,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 128 states have (on average 1.1953125) internal successors, (153), 134 states have internal predecessors, (153), 75 states have call successors, (75), 14 states have call predecessors, (75), 13 states have return successors, (73), 68 states have call predecessors, (73), 73 states have call successors, (73) [2021-05-02 15:01:17,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 301 transitions. [2021-05-02 15:01:17,216 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 301 transitions. Word has length 69 [2021-05-02 15:01:17,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:01:17,216 INFO L480 AbstractCegarLoop]: Abstraction has 217 states and 301 transitions. [2021-05-02 15:01:17,216 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-05-02 15:01:17,216 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 301 transitions. [2021-05-02 15:01:17,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-05-02 15:01:17,217 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:01:17,217 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 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, 1] [2021-05-02 15:01:17,441 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-02 15:01:17,441 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:01:17,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:01:17,441 INFO L82 PathProgramCache]: Analyzing trace with hash -298771846, now seen corresponding path program 1 times [2021-05-02 15:01:17,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:01:17,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269082451] [2021-05-02 15:01:17,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:01:17,456 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:01:17,456 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1584351341] [2021-05-02 15:01:17,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 15:01:17,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:01:17,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-02 15:01:17,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:01:17,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:17,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:17,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:17,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:17,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:17,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:17,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:17,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:17,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:17,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:17,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:17,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:17,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:17,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:17,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:17,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:17,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:17,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:17,696 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 20 proven. 11 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-05-02 15:01:17,696 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:01:17,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269082451] [2021-05-02 15:01:17,696 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:01:17,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584351341] [2021-05-02 15:01:17,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584351341] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:01:17,697 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:01:17,697 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 15:01:17,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906632429] [2021-05-02 15:01:17,697 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 15:01:17,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:01:17,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 15:01:17,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:01:17,698 INFO L87 Difference]: Start difference. First operand 217 states and 301 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 3 states have call successors, (12) [2021-05-02 15:01:17,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:01:17,926 INFO L93 Difference]: Finished difference Result 248 states and 343 transitions. [2021-05-02 15:01:17,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 15:01:17,926 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 3 states have call successors, (12) Word has length 74 [2021-05-02 15:01:17,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:01:17,928 INFO L225 Difference]: With dead ends: 248 [2021-05-02 15:01:17,928 INFO L226 Difference]: Without dead ends: 246 [2021-05-02 15:01:17,928 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 85.1ms TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-05-02 15:01:17,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-05-02 15:01:17,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 236. [2021-05-02 15:01:17,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 137 states have (on average 1.1897810218978102) internal successors, (163), 144 states have internal predecessors, (163), 83 states have call successors, (83), 16 states have call predecessors, (83), 15 states have return successors, (81), 75 states have call predecessors, (81), 81 states have call successors, (81) [2021-05-02 15:01:17,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 327 transitions. [2021-05-02 15:01:17,957 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 327 transitions. Word has length 74 [2021-05-02 15:01:17,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:01:17,957 INFO L480 AbstractCegarLoop]: Abstraction has 236 states and 327 transitions. [2021-05-02 15:01:17,957 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 3 states have call successors, (12) [2021-05-02 15:01:17,957 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 327 transitions. [2021-05-02 15:01:17,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-05-02 15:01:17,958 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:01:17,958 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:01:18,176 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-02 15:01:18,176 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:01:18,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:01:18,176 INFO L82 PathProgramCache]: Analyzing trace with hash -2089538094, now seen corresponding path program 1 times [2021-05-02 15:01:18,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:01:18,176 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795850431] [2021-05-02 15:01:18,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:01:18,185 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:01:18,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [677050956] [2021-05-02 15:01:18,185 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 15:01:18,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:01:18,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-02 15:01:18,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:01:18,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:18,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:18,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:18,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:18,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:18,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:18,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:18,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:18,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:18,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:18,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:18,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:18,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:18,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:18,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:18,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:18,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:18,772 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 16 proven. 31 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-05-02 15:01:18,773 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:01:18,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795850431] [2021-05-02 15:01:18,773 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:01:18,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677050956] [2021-05-02 15:01:18,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677050956] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:01:18,773 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:01:18,773 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-05-02 15:01:18,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696218703] [2021-05-02 15:01:18,774 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 15:01:18,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:01:18,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 15:01:18,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-05-02 15:01:18,775 INFO L87 Difference]: Start difference. First operand 236 states and 327 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 15 states have internal predecessors, (40), 5 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 15:01:19,888 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 33 [2021-05-02 15:01:20,385 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 30 [2021-05-02 15:01:21,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:01:21,613 INFO L93 Difference]: Finished difference Result 371 states and 534 transitions. [2021-05-02 15:01:21,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-02 15:01:21,614 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 15 states have internal predecessors, (40), 5 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 72 [2021-05-02 15:01:21,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:01:21,616 INFO L225 Difference]: With dead ends: 371 [2021-05-02 15:01:21,616 INFO L226 Difference]: Without dead ends: 369 [2021-05-02 15:01:21,617 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 1801.6ms TimeCoverageRelationStatistics Valid=417, Invalid=1935, Unknown=0, NotChecked=0, Total=2352 [2021-05-02 15:01:21,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-05-02 15:01:21,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 345. [2021-05-02 15:01:21,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 196 states have (on average 1.2142857142857142) internal successors, (238), 208 states have internal predecessors, (238), 131 states have call successors, (131), 18 states have call predecessors, (131), 17 states have return successors, (129), 118 states have call predecessors, (129), 129 states have call successors, (129) [2021-05-02 15:01:21,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 498 transitions. [2021-05-02 15:01:21,671 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 498 transitions. Word has length 72 [2021-05-02 15:01:21,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:01:21,671 INFO L480 AbstractCegarLoop]: Abstraction has 345 states and 498 transitions. [2021-05-02 15:01:21,671 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 15 states have internal predecessors, (40), 5 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 15:01:21,671 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 498 transitions. [2021-05-02 15:01:21,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-05-02 15:01:21,672 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:01:21,672 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 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, 1, 1] [2021-05-02 15:01:21,895 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:01:21,895 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:01:21,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:01:21,896 INFO L82 PathProgramCache]: Analyzing trace with hash 1984914564, now seen corresponding path program 2 times [2021-05-02 15:01:21,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:01:21,896 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453397772] [2021-05-02 15:01:21,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:01:21,907 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:01:21,908 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [484630796] [2021-05-02 15:01:21,908 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:01:21,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 15:01:21,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:01:21,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-02 15:01:21,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:01:22,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:22,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:22,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:22,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:22,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:22,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:22,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:22,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:22,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:22,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:22,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:22,095 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-05-02 15:01:22,095 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:01:22,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453397772] [2021-05-02 15:01:22,095 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:01:22,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484630796] [2021-05-02 15:01:22,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484630796] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:01:22,095 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:01:22,096 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 15:01:22,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112899881] [2021-05-02 15:01:22,096 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 15:01:22,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:01:22,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 15:01:22,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 15:01:22,097 INFO L87 Difference]: Start difference. First operand 345 states and 498 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-05-02 15:01:22,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:01:22,177 INFO L93 Difference]: Finished difference Result 585 states and 842 transitions. [2021-05-02 15:01:22,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 15:01:22,177 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 77 [2021-05-02 15:01:22,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:01:22,179 INFO L225 Difference]: With dead ends: 585 [2021-05-02 15:01:22,179 INFO L226 Difference]: Without dead ends: 326 [2021-05-02 15:01:22,183 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 18.0ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 15:01:22,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2021-05-02 15:01:22,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 299. [2021-05-02 15:01:22,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 175 states have (on average 1.2) internal successors, (210), 178 states have internal predecessors, (210), 107 states have call successors, (107), 17 states have call predecessors, (107), 16 states have return successors, (105), 103 states have call predecessors, (105), 105 states have call successors, (105) [2021-05-02 15:01:22,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 422 transitions. [2021-05-02 15:01:22,226 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 422 transitions. Word has length 77 [2021-05-02 15:01:22,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:01:22,226 INFO L480 AbstractCegarLoop]: Abstraction has 299 states and 422 transitions. [2021-05-02 15:01:22,227 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-05-02 15:01:22,227 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 422 transitions. [2021-05-02 15:01:22,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-05-02 15:01:22,227 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:01:22,228 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 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, 1, 1] [2021-05-02 15:01:22,444 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-02 15:01:22,445 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:01:22,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:01:22,445 INFO L82 PathProgramCache]: Analyzing trace with hash 2139677040, now seen corresponding path program 3 times [2021-05-02 15:01:22,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:01:22,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482231523] [2021-05-02 15:01:22,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:01:22,452 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:01:22,455 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [304795995] [2021-05-02 15:01:22,455 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:01:22,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-02 15:01:22,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:01:22,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-02 15:01:22,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:01:22,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:22,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:22,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:22,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:22,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:22,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:22,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:22,655 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-05-02 15:01:22,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:01:22,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482231523] [2021-05-02 15:01:22,656 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:01:22,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304795995] [2021-05-02 15:01:22,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304795995] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:01:22,656 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:01:22,656 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-02 15:01:22,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603219364] [2021-05-02 15:01:22,659 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 15:01:22,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:01:22,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 15:01:22,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 15:01:22,660 INFO L87 Difference]: Start difference. First operand 299 states and 422 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-05-02 15:01:22,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:01:22,779 INFO L93 Difference]: Finished difference Result 342 states and 489 transitions. [2021-05-02 15:01:22,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 15:01:22,779 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 77 [2021-05-02 15:01:22,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:01:22,782 INFO L225 Difference]: With dead ends: 342 [2021-05-02 15:01:22,782 INFO L226 Difference]: Without dead ends: 340 [2021-05-02 15:01:22,783 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 31.8ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-02 15:01:22,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-05-02 15:01:22,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 333. [2021-05-02 15:01:22,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 188 states have (on average 1.2127659574468086) internal successors, (228), 191 states have internal predecessors, (228), 127 states have call successors, (127), 18 states have call predecessors, (127), 17 states have return successors, (125), 123 states have call predecessors, (125), 125 states have call successors, (125) [2021-05-02 15:01:22,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 480 transitions. [2021-05-02 15:01:22,829 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 480 transitions. Word has length 77 [2021-05-02 15:01:22,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:01:22,829 INFO L480 AbstractCegarLoop]: Abstraction has 333 states and 480 transitions. [2021-05-02 15:01:22,829 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-05-02 15:01:22,829 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 480 transitions. [2021-05-02 15:01:22,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-05-02 15:01:22,830 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:01:22,830 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1] [2021-05-02 15:01:23,054 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-02 15:01:23,054 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:01:23,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:01:23,055 INFO L82 PathProgramCache]: Analyzing trace with hash -867272991, now seen corresponding path program 4 times [2021-05-02 15:01:23,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:01:23,055 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517196901] [2021-05-02 15:01:23,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:01:23,060 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:01:23,060 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [895316385] [2021-05-02 15:01:23,060 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:01:23,113 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 15:01:23,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:01:23,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 87 conjunts are in the unsatisfiable core [2021-05-02 15:01:23,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:01:23,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:23,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:23,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:23,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:23,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:23,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:23,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:23,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:23,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:23,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:23,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:23,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:23,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:23,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:23,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:01:23,941 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:01:23,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517196901] [2021-05-02 15:01:23,941 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:01:23,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895316385] [2021-05-02 15:01:23,941 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Infinite/NaN value [2021-05-02 15:01:23,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:01:23,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-05-02 15:01:23,941 ERROR L212 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2021-05-02 15:01:23,941 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-02 15:01:24,167 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-02 15:01:24,187 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-05-02 15:01:24,188 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 03:01:24 BoogieIcfgContainer [2021-05-02 15:01:24,188 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 15:01:24,188 INFO L168 Benchmark]: Toolchain (without parser) took 17083.50 ms. Allocated memory was 183.5 MB in the beginning and 418.4 MB in the end (delta: 234.9 MB). Free memory was 147.2 MB in the beginning and 303.3 MB in the end (delta: -156.1 MB). Peak memory consumption was 79.5 MB. Max. memory is 8.0 GB. [2021-05-02 15:01:24,188 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 183.5 MB. Free memory is still 163.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 15:01:24,189 INFO L168 Benchmark]: CACSL2BoogieTranslator took 278.85 ms. Allocated memory is still 183.5 MB. Free memory was 146.9 MB in the beginning and 166.6 MB in the end (delta: -19.7 MB). Peak memory consumption was 12.4 MB. Max. memory is 8.0 GB. [2021-05-02 15:01:24,189 INFO L168 Benchmark]: Boogie Preprocessor took 41.63 ms. Allocated memory is still 183.5 MB. Free memory was 166.6 MB in the beginning and 165.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-02 15:01:24,189 INFO L168 Benchmark]: RCFGBuilder took 424.32 ms. Allocated memory is still 183.5 MB. Free memory was 165.1 MB in the beginning and 148.0 MB in the end (delta: 17.1 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-05-02 15:01:24,189 INFO L168 Benchmark]: TraceAbstraction took 16331.52 ms. Allocated memory was 183.5 MB in the beginning and 418.4 MB in the end (delta: 234.9 MB). Free memory was 147.7 MB in the beginning and 303.3 MB in the end (delta: -155.5 MB). Peak memory consumption was 80.8 MB. Max. memory is 8.0 GB. [2021-05-02 15:01:24,189 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 183.5 MB. Free memory is still 163.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 278.85 ms. Allocated memory is still 183.5 MB. Free memory was 146.9 MB in the beginning and 166.6 MB in the end (delta: -19.7 MB). Peak memory consumption was 12.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 41.63 ms. Allocated memory is still 183.5 MB. Free memory was 166.6 MB in the beginning and 165.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 424.32 ms. Allocated memory is still 183.5 MB. Free memory was 165.1 MB in the beginning and 148.0 MB in the end (delta: 17.1 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 16331.52 ms. Allocated memory was 183.5 MB in the beginning and 418.4 MB in the end (delta: 234.9 MB). Free memory was 147.7 MB in the beginning and 303.3 MB in the end (delta: -155.5 MB). Peak memory consumption was 80.8 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 13]: 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: [L19] int x, y; [L20] long long a, b, p, q, r, s; [L21] x = __VERIFIER_nondet_int() [L22] CALL assume_abort_if_not(x>=0 && x<=50) [L8] COND FALSE !(!cond) [L22] RET assume_abort_if_not(x>=0 && x<=50) [L23] y = __VERIFIER_nondet_int() [L24] CALL assume_abort_if_not(y>=0 && y<=50) [L8] COND FALSE !(!cond) [L24] RET assume_abort_if_not(y>=0 && y<=50) [L25] CALL assume_abort_if_not(x >= 1) [L8] COND FALSE !(!cond) [L25] RET assume_abort_if_not(x >= 1) [L26] CALL assume_abort_if_not(y >= 1) [L8] COND FALSE !(!cond) [L26] RET assume_abort_if_not(y >= 1) [L28] a = x [L29] b = y [L30] p = 1 [L31] q = 0 [L32] r = 0 [L33] s = 1 [L35] COND TRUE 1 [L36] COND FALSE !(!(b != 0)) [L38] long long c, k; [L39] c = a [L40] k = 0 [L42] COND TRUE 1 [L43] COND TRUE !(c >= b) [L64] a = b [L65] b = c [L66] long long temp; [L67] temp = p [L68] p = q [L69] q = temp - q * k [L70] temp = r [L71] r = s [L72] s = temp - s * k [L35] COND TRUE 1 [L36] COND FALSE !(!(b != 0)) [L38] long long c, k; [L39] c = a [L40] k = 0 [L42] COND TRUE 1 [L43] COND FALSE !(!(c >= b)) [L45] long long d, v; [L46] d = 1 [L47] v = b [L49] COND TRUE 1 [L50] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L50] RET __VERIFIER_assert(a == y * r + x * p) [L51] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L51] RET __VERIFIER_assert(b == x * q + y * s) [L52] CALL __VERIFIER_assert(a == k * b + c) [L11] COND FALSE !(!(cond)) [L52] RET __VERIFIER_assert(a == k * b + c) [L53] CALL __VERIFIER_assert(v == b * d) [L11] COND FALSE !(!(cond)) [L53] RET __VERIFIER_assert(v == b * d) [L55] COND TRUE !(c >= 2 * v) [L60] c = c - v [L61] k = k + d [L42] COND TRUE 1 [L43] COND TRUE !(c >= b) [L64] a = b [L65] b = c [L66] long long temp; [L67] temp = p [L68] p = q [L69] q = temp - q * k [L70] temp = r [L71] r = s [L72] s = temp - s * k [L35] COND TRUE 1 [L36] COND FALSE !(!(b != 0)) [L38] long long c, k; [L39] c = a [L40] k = 0 [L42] COND TRUE 1 [L43] COND FALSE !(!(c >= b)) [L45] long long d, v; [L46] d = 1 [L47] v = b [L49] COND TRUE 1 [L50] CALL __VERIFIER_assert(a == y * r + x * p) [L11] COND FALSE !(!(cond)) [L50] RET __VERIFIER_assert(a == y * r + x * p) [L51] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND TRUE !(cond) [L13] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 43 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 16268.4ms, OverallIterations: 18, TraceHistogramMax: 8, EmptinessCheckTime: 23.2ms, AutomataDifference: 6285.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 9.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 806 SDtfs, 788 SDslu, 3477 SDs, 0 SdLazy, 3330 SolverSat, 669 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2604.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 968 GetRequests, 758 SyntacticMatches, 1 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 783 ImplicationChecksByTransitivity, 3347.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=345occurred in iteration=15, InterpolantAutomatonStates: 186, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 509.4ms AutomataMinimizationTime, 17 MinimizatonAttempts, 299 StatesRemovedByMinimization, 16 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 176.3ms SsaConstructionTime, 461.4ms SatisfiabilityAnalysisTime, 3470.9ms InterpolantComputationTime, 905 NumberOfCodeBlocks, 864 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 888 ConstructedInterpolants, 0 QuantifiedInterpolants, 3541 SizeOfPredicates, 72 NumberOfNonLiveVariables, 3009 ConjunctsInSsa, 343 ConjunctsInUnsatCore, 17 InterpolantComputations, 5 PerfectInterpolantSequences, 749/878 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...