/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/hard-u_valuebound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 15:32:57,020 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 15:32:57,021 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 15:32:57,039 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 15:32:57,046 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 15:32:57,047 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 15:32:57,047 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 15:32:57,048 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 15:32:57,049 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 15:32:57,049 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 15:32:57,050 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 15:32:57,062 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 15:32:57,063 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 15:32:57,064 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 15:32:57,065 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 15:32:57,066 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 15:32:57,067 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 15:32:57,078 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 15:32:57,079 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 15:32:57,079 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 15:32:57,080 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 15:32:57,108 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 15:32:57,109 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 15:32:57,109 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 15:32:57,110 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 15:32:57,110 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 15:32:57,110 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 15:32:57,110 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 15:32:57,110 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 15:32:57,110 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 15:32:57,110 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 15:32:57,110 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 15:32:57,110 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 15:32:57,110 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 15:32:57,111 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 15:32:57,111 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 15:32:57,111 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 15:32:57,111 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 15:32:57,111 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 15:32:57,111 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 15:32:57,111 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 15:32:57,111 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 15:32:57,111 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 15:32:57,112 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 15:32:57,112 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 15:32:57,112 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 15:32:57,112 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 15:32:57,112 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 15:32:57,112 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 15:32:57,112 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 15:32:57,307 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 15:32:57,325 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 15:32:57,326 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 15:32:57,327 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 15:32:57,329 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 15:32:57,329 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-u_valuebound20.c [2021-05-02 15:32:57,370 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/51f772fc5/21c89a9317b14044b8bbd000d860253e/FLAG959d4f9ec [2021-05-02 15:32:57,709 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 15:32:57,709 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-u_valuebound20.c [2021-05-02 15:32:57,714 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/51f772fc5/21c89a9317b14044b8bbd000d860253e/FLAG959d4f9ec [2021-05-02 15:32:58,128 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/51f772fc5/21c89a9317b14044b8bbd000d860253e [2021-05-02 15:32:58,130 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 15:32:58,131 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 15:32:58,132 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 15:32:58,132 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 15:32:58,137 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 15:32:58,137 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 03:32:58" (1/1) ... [2021-05-02 15:32:58,138 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e2bf286 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:32:58, skipping insertion in model container [2021-05-02 15:32:58,138 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 03:32:58" (1/1) ... [2021-05-02 15:32:58,143 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 15:32:58,154 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 15:32:58,247 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-u_valuebound20.c[545,558] [2021-05-02 15:32:58,257 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 15:32:58,261 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 15:32:58,269 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-u_valuebound20.c[545,558] [2021-05-02 15:32:58,274 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 15:32:58,282 INFO L208 MainTranslator]: Completed translation [2021-05-02 15:32:58,282 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:32:58 WrapperNode [2021-05-02 15:32:58,282 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 15:32:58,283 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 15:32:58,283 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 15:32:58,283 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 15:32:58,291 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:32:58" (1/1) ... [2021-05-02 15:32:58,291 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:32:58" (1/1) ... [2021-05-02 15:32:58,332 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:32:58" (1/1) ... [2021-05-02 15:32:58,333 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:32:58" (1/1) ... [2021-05-02 15:32:58,341 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:32:58" (1/1) ... [2021-05-02 15:32:58,344 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:32:58" (1/1) ... [2021-05-02 15:32:58,344 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:32:58" (1/1) ... [2021-05-02 15:32:58,345 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 15:32:58,346 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 15:32:58,346 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 15:32:58,346 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 15:32:58,347 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:32:58" (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 15:32:58,411 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 15:32:58,411 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 15:32:58,411 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 15:32:58,411 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 15:32:58,411 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 15:32:58,411 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 15:32:58,412 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 15:32:58,412 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 15:32:58,412 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 15:32:58,412 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 15:32:58,413 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-02 15:32:58,413 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 15:32:58,413 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 15:32:58,413 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 15:32:58,415 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 15:32:58,415 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 15:32:58,415 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 15:32:58,415 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 15:32:58,415 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 15:32:58,415 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 15:32:58,670 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 15:32:58,670 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-02 15:32:58,671 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 03:32:58 BoogieIcfgContainer [2021-05-02 15:32:58,671 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 15:32:58,672 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 15:32:58,672 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 15:32:58,674 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 15:32:58,674 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 03:32:58" (1/3) ... [2021-05-02 15:32:58,675 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62f8f399 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 03:32:58, skipping insertion in model container [2021-05-02 15:32:58,675 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:32:58" (2/3) ... [2021-05-02 15:32:58,675 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62f8f399 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 03:32:58, skipping insertion in model container [2021-05-02 15:32:58,675 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 03:32:58" (3/3) ... [2021-05-02 15:32:58,676 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-u_valuebound20.c [2021-05-02 15:32:58,696 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 15:32:58,698 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 15:32:58,709 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 15:32:58,733 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 15:32:58,733 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 15:32:58,733 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 15:32:58,733 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 15:32:58,733 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 15:32:58,733 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 15:32:58,733 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 15:32:58,733 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 15:32:58,748 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 15:32:58,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 15:32:58,751 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:32:58,752 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:32:58,752 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:32:58,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:32:58,756 INFO L82 PathProgramCache]: Analyzing trace with hash -1784424332, now seen corresponding path program 1 times [2021-05-02 15:32:58,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:32:58,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099838305] [2021-05-02 15:32:58,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:32:58,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:32:58,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 15:32:58,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:32:58,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 15:32:58,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:32:58,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 15:32:58,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:32:58,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 15:32:58,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:32:58,940 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 15:32:58,940 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:32:58,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099838305] [2021-05-02 15:32:58,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099838305] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:32:58,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:32:58,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 15:32:58,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126951320] [2021-05-02 15:32:58,944 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 15:32:58,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:32:58,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 15:32:58,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 15:32:58,953 INFO L87 Difference]: Start difference. First operand has 38 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 15:32:59,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:32:59,093 INFO L93 Difference]: Finished difference Result 69 states and 110 transitions. [2021-05-02 15:32:59,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 15:32:59,098 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2021-05-02 15:32:59,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:32:59,102 INFO L225 Difference]: With dead ends: 69 [2021-05-02 15:32:59,103 INFO L226 Difference]: Without dead ends: 33 [2021-05-02 15:32:59,105 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 15:32:59,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-02 15:32:59,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-05-02 15:32:59,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 15:32:59,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2021-05-02 15:32:59,131 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 28 [2021-05-02 15:32:59,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:32:59,131 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2021-05-02 15:32:59,131 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 15:32:59,131 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2021-05-02 15:32:59,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 15:32:59,132 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:32:59,133 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:32:59,133 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 15:32:59,133 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:32:59,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:32:59,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1361835634, now seen corresponding path program 1 times [2021-05-02 15:32:59,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:32:59,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642566595] [2021-05-02 15:32:59,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:32:59,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:32:59,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 15:32:59,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:32:59,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 15:32:59,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:32:59,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 15:32:59,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:32:59,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 15:32:59,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:32:59,220 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 15:32:59,220 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:32:59,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642566595] [2021-05-02 15:32:59,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642566595] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:32:59,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:32:59,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 15:32:59,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160344856] [2021-05-02 15:32:59,221 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 15:32:59,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:32:59,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 15:32:59,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 15:32:59,222 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-02 15:32:59,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:32:59,529 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions. [2021-05-02 15:32:59,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 15:32:59,530 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 28 [2021-05-02 15:32:59,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:32:59,531 INFO L225 Difference]: With dead ends: 46 [2021-05-02 15:32:59,531 INFO L226 Difference]: Without dead ends: 44 [2021-05-02 15:32:59,532 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 130.0ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:32:59,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-02 15:32:59,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2021-05-02 15:32:59,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 12 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 15:32:59,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2021-05-02 15:32:59,539 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 28 [2021-05-02 15:32:59,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:32:59,539 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2021-05-02 15:32:59,539 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-02 15:32:59,539 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2021-05-02 15:32:59,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 15:32:59,540 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:32:59,540 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:32:59,540 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 15:32:59,540 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:32:59,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:32:59,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1382067636, now seen corresponding path program 1 times [2021-05-02 15:32:59,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:32:59,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057928156] [2021-05-02 15:32:59,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:32:59,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:32:59,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 15:32:59,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:32:59,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 15:32:59,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:32:59,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 15:32:59,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:32:59,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 15:32:59,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:32:59,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-05-02 15:32:59,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:32:59,752 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 15:32:59,752 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:32:59,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057928156] [2021-05-02 15:32:59,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057928156] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:32:59,752 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:32:59,752 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 15:32:59,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433427472] [2021-05-02 15:32:59,753 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 15:32:59,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:32:59,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 15:32:59,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 15:32:59,754 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 15:33:00,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:33:00,002 INFO L93 Difference]: Finished difference Result 50 states and 63 transitions. [2021-05-02 15:33:00,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 15:33:00,003 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-05-02 15:33:00,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:33:00,006 INFO L225 Difference]: With dead ends: 50 [2021-05-02 15:33:00,006 INFO L226 Difference]: Without dead ends: 48 [2021-05-02 15:33:00,007 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 141.9ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:33:00,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-02 15:33:00,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2021-05-02 15:33:00,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 12 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 15:33:00,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2021-05-02 15:33:00,028 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 33 [2021-05-02 15:33:00,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:33:00,028 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2021-05-02 15:33:00,028 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 15:33:00,028 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2021-05-02 15:33:00,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-02 15:33:00,029 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:33:00,029 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:33:00,029 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-02 15:33:00,029 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:33:00,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:33:00,030 INFO L82 PathProgramCache]: Analyzing trace with hash -1455208590, now seen corresponding path program 1 times [2021-05-02 15:33:00,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:33:00,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359348846] [2021-05-02 15:33:00,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:33:00,048 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:33:00,048 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1854825309] [2021-05-02 15:33:00,048 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 15:33:00,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:33:00,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-02 15:33:00,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:33:00,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:00,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:00,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:00,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:00,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:00,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:00,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:00,313 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-05-02 15:33:00,313 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:33:00,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359348846] [2021-05-02 15:33:00,313 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:33:00,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854825309] [2021-05-02 15:33:00,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854825309] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:33:00,313 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:33:00,314 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 15:33:00,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123960421] [2021-05-02 15:33:00,314 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 15:33:00,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:33:00,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 15:33:00,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 15:33:00,315 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-02 15:33:00,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:33:00,437 INFO L93 Difference]: Finished difference Result 69 states and 89 transitions. [2021-05-02 15:33:00,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 15:33:00,437 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 38 [2021-05-02 15:33:00,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:33:00,439 INFO L225 Difference]: With dead ends: 69 [2021-05-02 15:33:00,439 INFO L226 Difference]: Without dead ends: 55 [2021-05-02 15:33:00,440 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 54.2ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:33:00,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-02 15:33:00,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-05-02 15:33:00,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 32 states have internal predecessors, (35), 18 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 15:33:00,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 68 transitions. [2021-05-02 15:33:00,459 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 68 transitions. Word has length 38 [2021-05-02 15:33:00,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:33:00,460 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 68 transitions. [2021-05-02 15:33:00,460 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-02 15:33:00,460 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 68 transitions. [2021-05-02 15:33:00,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-02 15:33:00,462 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:33:00,462 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:33:00,668 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:33:00,669 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:33:00,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:33:00,670 INFO L82 PathProgramCache]: Analyzing trace with hash -1688067263, now seen corresponding path program 1 times [2021-05-02 15:33:00,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:33:00,670 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222329647] [2021-05-02 15:33:00,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:33:00,677 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:33:00,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1085466479] [2021-05-02 15:33:00,677 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 15:33:00,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:33:00,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 15:33:00,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:33:00,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:00,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:00,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:00,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:00,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:00,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:00,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:00,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:00,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:00,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:00,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:00,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:00,838 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-05-02 15:33:00,838 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:33:00,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222329647] [2021-05-02 15:33:00,838 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:33:00,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085466479] [2021-05-02 15:33:00,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085466479] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:33:00,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:33:00,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 15:33:00,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891745501] [2021-05-02 15:33:00,839 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 15:33:00,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:33:00,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 15:33:00,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 15:33:00,839 INFO L87 Difference]: Start difference. First operand 55 states and 68 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 15:33:00,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:33:00,928 INFO L93 Difference]: Finished difference Result 68 states and 85 transitions. [2021-05-02 15:33:00,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 15:33:00,929 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 45 [2021-05-02 15:33:00,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:33:00,930 INFO L225 Difference]: With dead ends: 68 [2021-05-02 15:33:00,930 INFO L226 Difference]: Without dead ends: 61 [2021-05-02 15:33:00,930 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 32.8ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:33:00,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-05-02 15:33:00,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2021-05-02 15:33:00,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 36 states have internal predecessors, (40), 18 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-02 15:33:00,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 74 transitions. [2021-05-02 15:33:00,937 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 74 transitions. Word has length 45 [2021-05-02 15:33:00,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:33:00,937 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 74 transitions. [2021-05-02 15:33:00,937 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 15:33:00,938 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 74 transitions. [2021-05-02 15:33:00,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-02 15:33:00,938 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:33:00,938 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:33:01,153 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:33:01,153 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:33:01,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:33:01,153 INFO L82 PathProgramCache]: Analyzing trace with hash -1471734606, now seen corresponding path program 1 times [2021-05-02 15:33:01,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:33:01,154 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273181233] [2021-05-02 15:33:01,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:33:01,160 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:33:01,160 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [916485327] [2021-05-02 15:33:01,160 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 15:33:01,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:33:01,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-02 15:33:01,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:33:01,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:01,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:01,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:01,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:01,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:01,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:01,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:01,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:01,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:01,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:01,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:01,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:01,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:01,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:01,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:01,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:01,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:01,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:01,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:01,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:01,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:01,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:01,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:01,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:01,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:01,567 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-05-02 15:33:01,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:33:01,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273181233] [2021-05-02 15:33:01,568 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:33:01,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916485327] [2021-05-02 15:33:01,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916485327] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:33:01,568 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:33:01,568 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 15:33:01,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945744161] [2021-05-02 15:33:01,568 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 15:33:01,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:33:01,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 15:33:01,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-02 15:33:01,569 INFO L87 Difference]: Start difference. First operand 60 states and 74 transitions. Second operand has 11 states, 10 states have (on average 1.7) internal successors, (17), 8 states have internal predecessors, (17), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2021-05-02 15:33:01,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:33:01,837 INFO L93 Difference]: Finished difference Result 85 states and 105 transitions. [2021-05-02 15:33:01,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 15:33:01,837 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.7) internal successors, (17), 8 states have internal predecessors, (17), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) Word has length 55 [2021-05-02 15:33:01,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:33:01,839 INFO L225 Difference]: With dead ends: 85 [2021-05-02 15:33:01,839 INFO L226 Difference]: Without dead ends: 73 [2021-05-02 15:33:01,840 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 115.2ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-05-02 15:33:01,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-05-02 15:33:01,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2021-05-02 15:33:01,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 41 states have (on average 1.170731707317073) internal successors, (48), 43 states have internal predecessors, (48), 23 states have call successors, (23), 9 states have call predecessors, (23), 8 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 15:33:01,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 92 transitions. [2021-05-02 15:33:01,849 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 92 transitions. Word has length 55 [2021-05-02 15:33:01,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:33:01,849 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 92 transitions. [2021-05-02 15:33:01,849 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 1.7) internal successors, (17), 8 states have internal predecessors, (17), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2021-05-02 15:33:01,849 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 92 transitions. [2021-05-02 15:33:01,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-05-02 15:33:01,850 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:33:01,850 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:33:02,055 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:33:02,056 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:33:02,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:33:02,056 INFO L82 PathProgramCache]: Analyzing trace with hash -1254068366, now seen corresponding path program 2 times [2021-05-02 15:33:02,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:33:02,056 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326783217] [2021-05-02 15:33:02,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:33:02,064 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:33:02,064 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1098370236] [2021-05-02 15:33:02,065 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 15:33:02,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 15:33:02,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:33:02,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-02 15:33:02,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:33:02,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:02,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:02,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:02,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:02,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:02,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:02,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:02,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:02,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:02,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:02,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:02,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:02,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:02,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:02,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:02,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:02,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:02,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:02,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:02,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:02,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:02,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:02,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:02,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:02,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:02,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:02,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:02,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:02,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:02,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:02,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:02,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:02,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:02,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:02,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:02,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:02,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:02,902 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-05-02 15:33:02,902 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:33:02,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326783217] [2021-05-02 15:33:02,903 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:33:02,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098370236] [2021-05-02 15:33:02,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098370236] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:33:02,903 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:33:02,903 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 15:33:02,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638839772] [2021-05-02 15:33:02,904 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 15:33:02,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:33:02,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 15:33:02,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-05-02 15:33:02,905 INFO L87 Difference]: Start difference. First operand 73 states and 92 transitions. Second operand has 14 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 11 states have internal predecessors, (22), 6 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 7 states have call predecessors, (12), 6 states have call successors, (12) [2021-05-02 15:33:04,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:33:04,027 INFO L93 Difference]: Finished difference Result 98 states and 123 transitions. [2021-05-02 15:33:04,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 15:33:04,027 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 11 states have internal predecessors, (22), 6 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 7 states have call predecessors, (12), 6 states have call successors, (12) Word has length 72 [2021-05-02 15:33:04,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:33:04,028 INFO L225 Difference]: With dead ends: 98 [2021-05-02 15:33:04,028 INFO L226 Difference]: Without dead ends: 86 [2021-05-02 15:33:04,029 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 197.9ms TimeCoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-05-02 15:33:04,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-05-02 15:33:04,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2021-05-02 15:33:04,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 47 states have (on average 1.1702127659574468) internal successors, (55), 50 states have internal predecessors, (55), 28 states have call successors, (28), 10 states have call predecessors, (28), 9 states have return successors, (26), 24 states have call predecessors, (26), 26 states have call successors, (26) [2021-05-02 15:33:04,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 109 transitions. [2021-05-02 15:33:04,038 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 109 transitions. Word has length 72 [2021-05-02 15:33:04,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:33:04,039 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 109 transitions. [2021-05-02 15:33:04,039 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 11 states have internal predecessors, (22), 6 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 7 states have call predecessors, (12), 6 states have call successors, (12) [2021-05-02 15:33:04,039 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 109 transitions. [2021-05-02 15:33:04,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-02 15:33:04,040 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:33:04,040 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:33:04,250 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:33:04,250 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:33:04,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:33:04,251 INFO L82 PathProgramCache]: Analyzing trace with hash 680531353, now seen corresponding path program 1 times [2021-05-02 15:33:04,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:33:04,251 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27651977] [2021-05-02 15:33:04,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:33:04,259 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:33:04,259 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1496242640] [2021-05-02 15:33:04,259 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 15:33:08,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:33:08,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 52 conjunts are in the unsatisfiable core [2021-05-02 15:33:08,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:33:08,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:08,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:08,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:08,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:08,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:08,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:08,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:08,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:08,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:08,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:08,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:08,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:08,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:08,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:08,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:08,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:08,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:08,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:09,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:09,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:09,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:09,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:09,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:09,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:09,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:09,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:09,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:09,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:09,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:09,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:09,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:09,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:09,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:09,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:09,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:09,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:09,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:09,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:09,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:09,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:09,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:09,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:09,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:09,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:09,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:09,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:09,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:09,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:09,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:09,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:09,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:09,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:34:24,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:34:24,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:34:24,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:34:24,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:34:24,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:34:24,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:34:24,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:34:24,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:34:24,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:34:24,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:34:24,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:34:24,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:34:24,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:34:24,416 WARN L159 QuantifierPusher]: Ignoring assumption.