/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/divbin.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 13:36:46,051 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 13:36:46,054 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 13:36:46,100 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 13:36:46,126 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 13:36:46,128 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 13:36:46,130 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 13:36:46,131 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 13:36:46,135 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 13:36:46,137 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 13:36:46,139 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 13:36:46,146 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 13:36:46,148 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 13:36:46,152 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 13:36:46,152 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 13:36:46,153 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 13:36:46,155 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 13:36:46,160 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 13:36:46,163 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 13:36:46,163 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 13:36:46,167 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 13:36:46,204 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 13:36:46,204 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 13:36:46,207 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 13:36:46,208 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 13:36:46,208 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 13:36:46,208 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 13:36:46,208 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 13:36:46,208 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 13:36:46,209 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 13:36:46,209 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 13:36:46,209 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 13:36:46,209 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 13:36:46,210 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 13:36:46,210 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 13:36:46,210 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 13:36:46,210 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 13:36:46,210 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 13:36:46,210 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 13:36:46,210 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 13:36:46,210 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 13:36:46,210 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 13:36:46,210 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 13:36:46,211 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 13:36:46,211 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 13:36:46,211 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 13:36:46,211 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 13:36:46,211 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 13:36:46,211 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 13:36:46,211 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 13:36:46,539 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 13:36:46,557 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 13:36:46,560 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 13:36:46,561 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 13:36:46,561 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 13:36:46,562 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/divbin.i [2021-05-02 13:36:46,619 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab8ad1a31/75866d627a234af7a517fc7fbc25bc69/FLAGc21804f0b [2021-05-02 13:36:47,019 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 13:36:47,020 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/divbin.i [2021-05-02 13:36:47,026 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab8ad1a31/75866d627a234af7a517fc7fbc25bc69/FLAGc21804f0b [2021-05-02 13:36:47,040 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab8ad1a31/75866d627a234af7a517fc7fbc25bc69 [2021-05-02 13:36:47,043 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 13:36:47,046 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 13:36:47,048 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 13:36:47,048 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 13:36:47,052 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 13:36:47,053 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 01:36:47" (1/1) ... [2021-05-02 13:36:47,054 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62eac2ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:36:47, skipping insertion in model container [2021-05-02 13:36:47,054 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 01:36:47" (1/1) ... [2021-05-02 13:36:47,060 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 13:36:47,075 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 13:36:47,220 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/divbin.i[958,971] [2021-05-02 13:36:47,241 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 13:36:47,252 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 13:36:47,265 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/divbin.i[958,971] [2021-05-02 13:36:47,279 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 13:36:47,346 INFO L208 MainTranslator]: Completed translation [2021-05-02 13:36:47,346 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:36:47 WrapperNode [2021-05-02 13:36:47,346 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 13:36:47,347 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 13:36:47,347 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 13:36:47,350 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 13:36:47,359 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:36:47" (1/1) ... [2021-05-02 13:36:47,360 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:36:47" (1/1) ... [2021-05-02 13:36:47,367 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:36:47" (1/1) ... [2021-05-02 13:36:47,367 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:36:47" (1/1) ... [2021-05-02 13:36:47,379 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:36:47" (1/1) ... [2021-05-02 13:36:47,383 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:36:47" (1/1) ... [2021-05-02 13:36:47,388 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:36:47" (1/1) ... [2021-05-02 13:36:47,390 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 13:36:47,392 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 13:36:47,392 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 13:36:47,392 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 13:36:47,393 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:36:47" (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 13:36:47,550 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 13:36:47,550 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 13:36:47,551 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 13:36:47,551 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 13:36:47,551 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 13:36:47,551 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 13:36:47,551 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 13:36:47,551 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 13:36:47,551 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-02 13:36:47,552 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-02 13:36:47,552 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 13:36:47,552 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 13:36:47,553 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-02 13:36:47,553 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 13:36:47,553 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 13:36:47,553 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 13:36:47,553 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 13:36:47,553 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 13:36:47,553 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 13:36:47,554 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 13:36:47,554 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 13:36:47,554 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 13:36:47,835 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 13:36:47,835 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-02 13:36:47,836 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 01:36:47 BoogieIcfgContainer [2021-05-02 13:36:47,837 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 13:36:47,838 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 13:36:47,838 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 13:36:47,840 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 13:36:47,840 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 01:36:47" (1/3) ... [2021-05-02 13:36:47,851 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45bea0af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 01:36:47, skipping insertion in model container [2021-05-02 13:36:47,852 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:36:47" (2/3) ... [2021-05-02 13:36:47,852 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45bea0af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 01:36:47, skipping insertion in model container [2021-05-02 13:36:47,852 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 01:36:47" (3/3) ... [2021-05-02 13:36:47,853 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin.i [2021-05-02 13:36:47,858 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 13:36:47,861 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 13:36:47,891 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 13:36:47,937 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 13:36:47,937 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 13:36:47,937 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 13:36:47,937 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 13:36:47,938 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 13:36:47,938 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 13:36:47,938 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 13:36:47,938 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 13:36:47,963 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 13:36:47,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 13:36:47,967 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:36:47,968 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:36:47,969 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:36:47,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:36:47,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1345265538, now seen corresponding path program 1 times [2021-05-02 13:36:47,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:36:47,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772669392] [2021-05-02 13:36:47,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:36:48,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:36:48,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:36:48,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:36:48,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 13:36:48,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:36:48,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-02 13:36:48,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:36:48,120 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 13:36:48,121 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:36:48,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772669392] [2021-05-02 13:36:48,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772669392] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 13:36:48,121 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 13:36:48,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 13:36:48,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148555876] [2021-05-02 13:36:48,125 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 13:36:48,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:36:48,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 13:36:48,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 13:36:48,134 INFO L87 Difference]: Start difference. First operand has 31 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 13:36:48,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:36:48,189 INFO L93 Difference]: Finished difference Result 55 states and 78 transitions. [2021-05-02 13:36:48,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 13:36:48,192 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-02 13:36:48,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:36:48,196 INFO L225 Difference]: With dead ends: 55 [2021-05-02 13:36:48,196 INFO L226 Difference]: Without dead ends: 26 [2021-05-02 13:36:48,198 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 13:36:48,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-02 13:36:48,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-05-02 13:36:48,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 13:36:48,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2021-05-02 13:36:48,234 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 23 [2021-05-02 13:36:48,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:36:48,235 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2021-05-02 13:36:48,235 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 13:36:48,235 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2021-05-02 13:36:48,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-02 13:36:48,237 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:36:48,240 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:36:48,241 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 13:36:48,241 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:36:48,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:36:48,242 INFO L82 PathProgramCache]: Analyzing trace with hash -1801528411, now seen corresponding path program 1 times [2021-05-02 13:36:48,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:36:48,243 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093066595] [2021-05-02 13:36:48,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:36:48,297 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:36:48,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [778194527] [2021-05-02 13:36:48,298 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 13:36:48,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:36:48,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-02 13:36:48,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:36:48,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:48,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:48,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:48,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:48,559 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 13:36:48,559 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:36:48,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093066595] [2021-05-02 13:36:48,560 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:36:48,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778194527] [2021-05-02 13:36:48,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778194527] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:36:48,560 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:36:48,560 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 13:36:48,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873371785] [2021-05-02 13:36:48,561 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 13:36:48,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:36:48,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 13:36:48,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-02 13:36:48,563 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 13:36:48,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:36:48,679 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2021-05-02 13:36:48,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 13:36:48,679 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2021-05-02 13:36:48,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:36:48,681 INFO L225 Difference]: With dead ends: 39 [2021-05-02 13:36:48,681 INFO L226 Difference]: Without dead ends: 36 [2021-05-02 13:36:48,682 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 83.7ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-02 13:36:48,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-02 13:36:48,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-05-02 13:36:48,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 24 states have (on average 1.25) internal successors, (30), 25 states have internal predecessors, (30), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 13:36:48,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2021-05-02 13:36:48,689 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 24 [2021-05-02 13:36:48,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:36:48,690 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2021-05-02 13:36:48,690 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 13:36:48,690 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2021-05-02 13:36:48,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-02 13:36:48,691 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:36:48,691 INFO L523 BasicCegarLoop]: trace histogram [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 13:36:48,908 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 13:36:48,909 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:36:48,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:36:48,909 INFO L82 PathProgramCache]: Analyzing trace with hash 262955552, now seen corresponding path program 1 times [2021-05-02 13:36:48,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:36:48,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006591423] [2021-05-02 13:36:48,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:36:48,923 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:36:48,923 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [973689340] [2021-05-02 13:36:48,923 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 13:36:48,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:36:48,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 13:36:48,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:36:49,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:49,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:49,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:49,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:49,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:49,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:49,163 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 13:36:49,163 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:36:49,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006591423] [2021-05-02 13:36:49,164 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:36:49,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973689340] [2021-05-02 13:36:49,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973689340] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:36:49,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:36:49,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 13:36:49,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035553199] [2021-05-02 13:36:49,165 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 13:36:49,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:36:49,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 13:36:49,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-05-02 13:36:49,166 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 7 states have internal predecessors, (15), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 13:36:49,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:36:49,340 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2021-05-02 13:36:49,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 13:36:49,341 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 7 states have internal predecessors, (15), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2021-05-02 13:36:49,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:36:49,342 INFO L225 Difference]: With dead ends: 54 [2021-05-02 13:36:49,342 INFO L226 Difference]: Without dead ends: 51 [2021-05-02 13:36:49,343 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 122.6ms TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-05-02 13:36:49,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-05-02 13:36:49,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 34. [2021-05-02 13:36:49,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 23 states have internal predecessors, (27), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 13:36:49,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2021-05-02 13:36:49,350 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 26 [2021-05-02 13:36:49,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:36:49,350 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2021-05-02 13:36:49,350 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 7 states have internal predecessors, (15), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 13:36:49,350 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2021-05-02 13:36:49,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-02 13:36:49,351 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:36:49,351 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:36:49,564 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:36:49,564 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:36:49,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:36:49,565 INFO L82 PathProgramCache]: Analyzing trace with hash 96987309, now seen corresponding path program 1 times [2021-05-02 13:36:49,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:36:49,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23787592] [2021-05-02 13:36:49,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:36:49,577 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:36:49,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1946234403] [2021-05-02 13:36:49,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 13:36:49,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:36:49,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 3 conjunts are in the unsatisfiable core [2021-05-02 13:36:49,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:36:49,691 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 13:36:49,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:36:49,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23787592] [2021-05-02 13:36:49,692 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:36:49,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946234403] [2021-05-02 13:36:49,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946234403] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 13:36:49,692 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 13:36:49,692 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 13:36:49,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598592946] [2021-05-02 13:36:49,692 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 13:36:49,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:36:49,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 13:36:49,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 13:36:49,693 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 13:36:49,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:36:49,730 INFO L93 Difference]: Finished difference Result 58 states and 68 transitions. [2021-05-02 13:36:49,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 13:36:49,730 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2021-05-02 13:36:49,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:36:49,731 INFO L225 Difference]: With dead ends: 58 [2021-05-02 13:36:49,731 INFO L226 Difference]: Without dead ends: 36 [2021-05-02 13:36:49,731 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 13:36:49,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-02 13:36:49,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-05-02 13:36:49,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 25 states have internal predecessors, (29), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 13:36:49,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2021-05-02 13:36:49,735 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 32 [2021-05-02 13:36:49,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:36:49,735 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2021-05-02 13:36:49,735 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 13:36:49,735 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2021-05-02 13:36:49,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-02 13:36:49,745 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:36:49,745 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:36:49,960 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:36:49,960 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:36:49,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:36:49,961 INFO L82 PathProgramCache]: Analyzing trace with hash 852542504, now seen corresponding path program 1 times [2021-05-02 13:36:49,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:36:49,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22804757] [2021-05-02 13:36:49,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:36:49,970 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:36:49,970 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1373105515] [2021-05-02 13:36:49,970 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 13:36:50,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:36:50,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-02 13:36:50,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:36:50,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:50,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:50,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:50,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:50,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:50,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:50,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:50,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:50,339 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 13:36:50,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:36:50,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22804757] [2021-05-02 13:36:50,339 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:36:50,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373105515] [2021-05-02 13:36:50,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373105515] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:36:50,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:36:50,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 13:36:50,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727256543] [2021-05-02 13:36:50,340 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 13:36:50,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:36:50,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 13:36:50,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-05-02 13:36:50,340 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand has 11 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 13:36:50,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:36:50,521 INFO L93 Difference]: Finished difference Result 46 states and 52 transitions. [2021-05-02 13:36:50,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 13:36:50,522 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 34 [2021-05-02 13:36:50,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:36:50,523 INFO L225 Difference]: With dead ends: 46 [2021-05-02 13:36:50,523 INFO L226 Difference]: Without dead ends: 43 [2021-05-02 13:36:50,523 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 159.5ms TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-05-02 13:36:50,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-02 13:36:50,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-05-02 13:36:50,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 30 states have internal predecessors, (34), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 13:36:50,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2021-05-02 13:36:50,528 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 34 [2021-05-02 13:36:50,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:36:50,528 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2021-05-02 13:36:50,528 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 13:36:50,528 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2021-05-02 13:36:50,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-02 13:36:50,529 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:36:50,529 INFO L523 BasicCegarLoop]: trace histogram [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] [2021-05-02 13:36:50,733 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:36:50,733 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:36:50,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:36:50,734 INFO L82 PathProgramCache]: Analyzing trace with hash -963207632, now seen corresponding path program 2 times [2021-05-02 13:36:50,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:36:50,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92894798] [2021-05-02 13:36:50,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:36:50,743 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:36:50,743 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1786481570] [2021-05-02 13:36:50,743 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:36:51,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 13:36:51,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:36:51,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 13:36:51,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:36:51,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:51,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:51,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:51,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:51,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:51,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:51,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:51,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:52,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:36:57,017 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-05-02 13:36:57,018 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:36:57,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92894798] [2021-05-02 13:36:57,018 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:36:57,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786481570] [2021-05-02 13:36:57,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786481570] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:36:57,018 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:36:57,018 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 13:36:57,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216797980] [2021-05-02 13:36:57,019 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 13:36:57,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:36:57,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 13:36:57,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-05-02 13:36:57,019 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand has 11 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 13:36:57,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:36:57,405 INFO L93 Difference]: Finished difference Result 81 states and 94 transitions. [2021-05-02 13:36:57,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 13:36:57,406 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 42 [2021-05-02 13:36:57,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:36:57,406 INFO L225 Difference]: With dead ends: 81 [2021-05-02 13:36:57,406 INFO L226 Difference]: Without dead ends: 45 [2021-05-02 13:36:57,407 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 165.5ms TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-05-02 13:36:57,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-02 13:36:57,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-05-02 13:36:57,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 32 states have internal predecessors, (36), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 13:36:57,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 50 transitions. [2021-05-02 13:36:57,411 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 50 transitions. Word has length 42 [2021-05-02 13:36:57,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:36:57,411 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 50 transitions. [2021-05-02 13:36:57,411 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 13:36:57,411 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 50 transitions. [2021-05-02 13:36:57,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-02 13:36:57,412 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:36:57,412 INFO L523 BasicCegarLoop]: trace histogram [3, 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] [2021-05-02 13:36:57,617 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 13:36:57,617 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:36:57,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:36:57,618 INFO L82 PathProgramCache]: Analyzing trace with hash 2020318187, now seen corresponding path program 3 times [2021-05-02 13:36:57,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:36:57,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260911690] [2021-05-02 13:36:57,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:36:57,635 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:36:57,635 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [345326541] [2021-05-02 13:36:57,635 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 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 13:37:01,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 13:37:01,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:37:01,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 57 conjunts are in the unsatisfiable core [2021-05-02 13:37:01,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:37:01,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:37:01,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:37:02,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:37:02,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:37:02,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:37:02,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:37:03,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:37:04,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:37:04,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:37:04,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:37:04,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:37:04,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:37:04,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:37:04,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:37:04,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:37:04,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:37:04,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:37:04,570 WARN L159 QuantifierPusher]: Ignoring assumption.