/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_valuebound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 15:33:40,673 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 15:33:40,675 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 15:33:40,718 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 15:33:40,740 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 15:33:40,742 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 15:33:40,743 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 15:33:40,744 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 15:33:40,747 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 15:33:40,748 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 15:33:40,750 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 15:33:40,753 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 15:33:40,754 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 15:33:40,757 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 15:33:40,758 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 15:33:40,760 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 15:33:40,763 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 15:33:40,771 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 15:33:40,772 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 15:33:40,772 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 15:33:40,776 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 15:33:40,809 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 15:33:40,809 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 15:33:40,811 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 15:33:40,811 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 15:33:40,812 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 15:33:40,812 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 15:33:40,812 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 15:33:40,812 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 15:33:40,812 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 15:33:40,812 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 15:33:40,813 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 15:33:40,813 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 15:33:40,813 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 15:33:40,813 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 15:33:40,814 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 15:33:40,814 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 15:33:40,814 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 15:33:40,814 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 15:33:40,814 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 15:33:40,814 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 15:33:40,814 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 15:33:40,815 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 15:33:40,815 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 15:33:40,815 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 15:33:40,815 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 15:33:40,815 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 15:33:40,815 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 15:33:40,815 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 15:33:40,815 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 15:33:41,120 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 15:33:41,136 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 15:33:41,138 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 15:33:41,139 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 15:33:41,139 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 15:33:41,140 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-u_valuebound5.c [2021-05-02 15:33:41,201 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7090f8f82/b3e0b62a2f92417ba95ca52766e9e5ee/FLAG38ffdfa05 [2021-05-02 15:33:41,725 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 15:33:41,727 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-u_valuebound5.c [2021-05-02 15:33:41,733 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7090f8f82/b3e0b62a2f92417ba95ca52766e9e5ee/FLAG38ffdfa05 [2021-05-02 15:33:42,029 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7090f8f82/b3e0b62a2f92417ba95ca52766e9e5ee [2021-05-02 15:33:42,032 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 15:33:42,033 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 15:33:42,034 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 15:33:42,034 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 15:33:42,037 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 15:33:42,038 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 03:33:42" (1/1) ... [2021-05-02 15:33:42,039 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@420af5b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:33:42, skipping insertion in model container [2021-05-02 15:33:42,039 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 03:33:42" (1/1) ... [2021-05-02 15:33:42,045 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 15:33:42,058 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 15:33:42,191 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_valuebound5.c[545,558] [2021-05-02 15:33:42,222 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 15:33:42,229 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 15:33:42,243 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_valuebound5.c[545,558] [2021-05-02 15:33:42,263 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 15:33:42,277 INFO L208 MainTranslator]: Completed translation [2021-05-02 15:33:42,277 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:33:42 WrapperNode [2021-05-02 15:33:42,278 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 15:33:42,280 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 15:33:42,280 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 15:33:42,308 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 15:33:42,318 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:33:42" (1/1) ... [2021-05-02 15:33:42,318 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:33:42" (1/1) ... [2021-05-02 15:33:42,351 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:33:42" (1/1) ... [2021-05-02 15:33:42,351 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:33:42" (1/1) ... [2021-05-02 15:33:42,362 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:33:42" (1/1) ... [2021-05-02 15:33:42,368 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:33:42" (1/1) ... [2021-05-02 15:33:42,376 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:33:42" (1/1) ... [2021-05-02 15:33:42,377 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 15:33:42,378 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 15:33:42,378 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 15:33:42,379 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 15:33:42,379 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:33:42" (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 15:33:42,449 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 15:33:42,449 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 15:33:42,450 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 15:33:42,450 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 15:33:42,450 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 15:33:42,450 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 15:33:42,450 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 15:33:42,450 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 15:33:42,451 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 15:33:42,451 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 15:33:42,451 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-02 15:33:42,451 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 15:33:42,452 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 15:33:42,452 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 15:33:42,452 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 15:33:42,453 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 15:33:42,453 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 15:33:42,453 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 15:33:42,453 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 15:33:42,453 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 15:33:42,724 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 15:33:42,725 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-02 15:33:42,742 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 03:33:42 BoogieIcfgContainer [2021-05-02 15:33:42,742 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 15:33:42,744 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 15:33:42,744 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 15:33:42,746 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 15:33:42,746 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 03:33:42" (1/3) ... [2021-05-02 15:33:42,747 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14b9197c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 03:33:42, skipping insertion in model container [2021-05-02 15:33:42,747 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:33:42" (2/3) ... [2021-05-02 15:33:42,747 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14b9197c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 03:33:42, skipping insertion in model container [2021-05-02 15:33:42,747 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 03:33:42" (3/3) ... [2021-05-02 15:33:42,748 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-u_valuebound5.c [2021-05-02 15:33:42,752 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 15:33:42,755 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 15:33:42,791 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 15:33:42,810 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 15:33:42,810 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 15:33:42,810 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 15:33:42,810 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 15:33:42,810 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 15:33:42,810 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 15:33:42,811 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 15:33:42,811 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 15:33:42,829 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 15:33:42,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 15:33:42,833 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:33:42,834 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 15:33:42,834 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:33:42,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:33:42,838 INFO L82 PathProgramCache]: Analyzing trace with hash -1784424332, now seen corresponding path program 1 times [2021-05-02 15:33:42,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:33:42,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70743892] [2021-05-02 15:33:42,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:33:42,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:33:43,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 15:33:43,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:33:43,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 15:33:43,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:33:43,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 15:33:43,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:33:43,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 15:33:43,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:33:43,103 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 15:33:43,103 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:33:43,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70743892] [2021-05-02 15:33:43,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70743892] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:33:43,104 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:33:43,104 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 15:33:43,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128163852] [2021-05-02 15:33:43,108 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 15:33:43,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:33:43,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 15:33:43,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 15:33:43,121 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 15:33:43,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:33:43,312 INFO L93 Difference]: Finished difference Result 69 states and 110 transitions. [2021-05-02 15:33:43,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 15:33:43,314 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 15:33:43,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:33:43,320 INFO L225 Difference]: With dead ends: 69 [2021-05-02 15:33:43,320 INFO L226 Difference]: Without dead ends: 33 [2021-05-02 15:33:43,323 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 15:33:43,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-02 15:33:43,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-05-02 15:33:43,372 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 15:33:43,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2021-05-02 15:33:43,377 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 28 [2021-05-02 15:33:43,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:33:43,377 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2021-05-02 15:33:43,378 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 15:33:43,378 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2021-05-02 15:33:43,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 15:33:43,379 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:33:43,379 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 15:33:43,380 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 15:33:43,380 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:33:43,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:33:43,383 INFO L82 PathProgramCache]: Analyzing trace with hash 1361835634, now seen corresponding path program 1 times [2021-05-02 15:33:43,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:33:43,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112947574] [2021-05-02 15:33:43,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:33:43,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:33:43,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 15:33:43,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:33:43,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 15:33:43,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:33:43,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 15:33:43,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:33:43,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 15:33:43,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:33:43,592 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 15:33:43,592 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:33:43,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112947574] [2021-05-02 15:33:43,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112947574] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:33:43,593 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:33:43,593 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 15:33:43,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215165646] [2021-05-02 15:33:43,594 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 15:33:43,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:33:43,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 15:33:43,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 15:33:43,595 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 15:33:43,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:33:43,964 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions. [2021-05-02 15:33:43,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 15:33:43,965 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 15:33:43,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:33:43,966 INFO L225 Difference]: With dead ends: 46 [2021-05-02 15:33:43,967 INFO L226 Difference]: Without dead ends: 44 [2021-05-02 15:33:43,967 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 171.8ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:33:43,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-02 15:33:43,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2021-05-02 15:33:43,982 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 15:33:43,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2021-05-02 15:33:43,983 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 28 [2021-05-02 15:33:43,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:33:43,984 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2021-05-02 15:33:43,984 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 15:33:43,984 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2021-05-02 15:33:43,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 15:33:43,985 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:33:43,985 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 15:33:43,985 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 15:33:43,985 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:33:43,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:33:43,986 INFO L82 PathProgramCache]: Analyzing trace with hash 1382067636, now seen corresponding path program 1 times [2021-05-02 15:33:43,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:33:43,986 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528031712] [2021-05-02 15:33:43,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:33:44,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:33:44,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 15:33:44,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:33:44,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 15:33:44,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:33:44,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 15:33:44,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:33:44,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 15:33:44,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:33:44,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-05-02 15:33:44,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:33:44,206 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 15:33:44,207 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:33:44,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528031712] [2021-05-02 15:33:44,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528031712] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:33:44,207 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:33:44,207 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 15:33:44,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98893206] [2021-05-02 15:33:44,208 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 15:33:44,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:33:44,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 15:33:44,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 15:33:44,209 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 15:33:44,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:33:44,505 INFO L93 Difference]: Finished difference Result 50 states and 63 transitions. [2021-05-02 15:33:44,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 15:33:44,506 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 15:33:44,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:33:44,508 INFO L225 Difference]: With dead ends: 50 [2021-05-02 15:33:44,508 INFO L226 Difference]: Without dead ends: 48 [2021-05-02 15:33:44,508 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 173.1ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:33:44,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-02 15:33:44,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2021-05-02 15:33:44,523 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 15:33:44,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2021-05-02 15:33:44,528 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 33 [2021-05-02 15:33:44,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:33:44,529 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2021-05-02 15:33:44,529 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 15:33:44,529 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2021-05-02 15:33:44,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-02 15:33:44,531 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:33:44,531 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 15:33:44,531 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-02 15:33:44,531 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:33:44,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:33:44,532 INFO L82 PathProgramCache]: Analyzing trace with hash -1455208590, now seen corresponding path program 1 times [2021-05-02 15:33:44,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:33:44,532 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089249827] [2021-05-02 15:33:44,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:33:44,561 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:33:44,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1387117934] [2021-05-02 15:33:44,561 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 15:33:44,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:33:44,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-02 15:33:44,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:33:44,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:44,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:44,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:44,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:44,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:44,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:44,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:44,833 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 15:33:44,833 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:33:44,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089249827] [2021-05-02 15:33:44,834 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:33:44,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387117934] [2021-05-02 15:33:44,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387117934] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:33:44,834 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:33:44,834 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 15:33:44,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936991297] [2021-05-02 15:33:44,835 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 15:33:44,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:33:44,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 15:33:44,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 15:33:44,836 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 15:33:44,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:33:44,995 INFO L93 Difference]: Finished difference Result 69 states and 89 transitions. [2021-05-02 15:33:44,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 15:33:44,996 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 15:33:44,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:33:44,998 INFO L225 Difference]: With dead ends: 69 [2021-05-02 15:33:44,998 INFO L226 Difference]: Without dead ends: 55 [2021-05-02 15:33:44,999 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 49.4ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:33:45,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-02 15:33:45,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-05-02 15:33:45,011 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 15:33:45,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 68 transitions. [2021-05-02 15:33:45,014 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 68 transitions. Word has length 38 [2021-05-02 15:33:45,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:33:45,015 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 68 transitions. [2021-05-02 15:33:45,015 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 15:33:45,016 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 68 transitions. [2021-05-02 15:33:45,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-02 15:33:45,017 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:33:45,017 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 15:33:45,229 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:33:45,230 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:33:45,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:33:45,230 INFO L82 PathProgramCache]: Analyzing trace with hash -1688067263, now seen corresponding path program 1 times [2021-05-02 15:33:45,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:33:45,231 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222708082] [2021-05-02 15:33:45,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:33:45,246 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:33:45,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [104069523] [2021-05-02 15:33:45,247 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 15:33:45,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:33:45,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 15:33:45,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:33:45,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:45,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:45,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:45,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:45,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:45,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:45,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:45,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:45,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:45,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:45,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:45,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:45,575 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 15:33:45,575 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:33:45,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222708082] [2021-05-02 15:33:45,576 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:33:45,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104069523] [2021-05-02 15:33:45,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104069523] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:33:45,576 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:33:45,576 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 15:33:45,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763320223] [2021-05-02 15:33:45,577 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 15:33:45,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:33:45,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 15:33:45,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 15:33:45,579 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 15:33:45,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:33:45,709 INFO L93 Difference]: Finished difference Result 68 states and 85 transitions. [2021-05-02 15:33:45,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 15:33:45,709 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 15:33:45,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:33:45,713 INFO L225 Difference]: With dead ends: 68 [2021-05-02 15:33:45,713 INFO L226 Difference]: Without dead ends: 61 [2021-05-02 15:33:45,713 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 47.4ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:33:45,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-05-02 15:33:45,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2021-05-02 15:33:45,737 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 15:33:45,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 74 transitions. [2021-05-02 15:33:45,738 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 74 transitions. Word has length 45 [2021-05-02 15:33:45,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:33:45,739 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 74 transitions. [2021-05-02 15:33:45,740 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 15:33:45,740 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 74 transitions. [2021-05-02 15:33:45,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-02 15:33:45,744 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:33:45,744 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 15:33:45,945 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:33:45,946 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:33:45,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:33:45,946 INFO L82 PathProgramCache]: Analyzing trace with hash -1471734606, now seen corresponding path program 1 times [2021-05-02 15:33:45,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:33:45,947 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124970911] [2021-05-02 15:33:45,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:33:45,958 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:33:45,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1663081968] [2021-05-02 15:33:45,958 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 15:33:46,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:33:46,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-02 15:33:46,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:33:46,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:46,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:46,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:46,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:46,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:46,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:46,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:46,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:46,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:46,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:46,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:46,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:46,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:46,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:46,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:46,450 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 15 proven. 11 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-02 15:33:46,451 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:33:46,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124970911] [2021-05-02 15:33:46,451 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:33:46,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663081968] [2021-05-02 15:33:46,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663081968] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:33:46,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:33:46,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 15:33:46,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029819337] [2021-05-02 15:33:46,452 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 15:33:46,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:33:46,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 15:33:46,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-05-02 15:33:46,453 INFO L87 Difference]: Start difference. First operand 60 states and 74 transitions. Second operand has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 15:33:46,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:33:46,951 INFO L93 Difference]: Finished difference Result 85 states and 105 transitions. [2021-05-02 15:33:46,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 15:33:46,952 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) Word has length 55 [2021-05-02 15:33:46,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:33:46,954 INFO L225 Difference]: With dead ends: 85 [2021-05-02 15:33:46,954 INFO L226 Difference]: Without dead ends: 73 [2021-05-02 15:33:46,954 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 122.7ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-05-02 15:33:46,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-05-02 15:33:46,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2021-05-02 15:33:46,966 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 15:33:46,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 92 transitions. [2021-05-02 15:33:46,967 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 92 transitions. Word has length 55 [2021-05-02 15:33:46,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:33:46,967 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 92 transitions. [2021-05-02 15:33:46,967 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 15:33:46,967 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 92 transitions. [2021-05-02 15:33:46,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-05-02 15:33:46,968 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:33:46,968 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 15:33:47,173 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:33:47,173 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:33:47,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:33:47,173 INFO L82 PathProgramCache]: Analyzing trace with hash -1254068366, now seen corresponding path program 2 times [2021-05-02 15:33:47,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:33:47,174 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707614892] [2021-05-02 15:33:47,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:33:47,182 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:33:47,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1730616263] [2021-05-02 15:33:47,182 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 15:33:47,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 15:33:47,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:33:47,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-02 15:33:47,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:33:47,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:47,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:47,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:47,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:47,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:47,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:47,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:47,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:47,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:47,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:47,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:47,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:47,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:47,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:47,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:47,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:47,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:47,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:47,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:47,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:47,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:47,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:47,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:48,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:48,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:49,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:49,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:49,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:50,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:50,375 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 35 proven. 36 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-05-02 15:33:50,375 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:33:50,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707614892] [2021-05-02 15:33:50,377 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:33:50,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730616263] [2021-05-02 15:33:50,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730616263] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:33:50,377 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:33:50,377 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 15:33:50,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262509296] [2021-05-02 15:33:50,378 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 15:33:50,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:33:50,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 15:33:50,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-05-02 15:33:50,378 INFO L87 Difference]: Start difference. First operand 73 states and 92 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 11 states have internal predecessors, (25), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 15:33:51,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:33:51,906 INFO L93 Difference]: Finished difference Result 98 states and 123 transitions. [2021-05-02 15:33:51,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 15:33:51,907 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 11 states have internal predecessors, (25), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) Word has length 72 [2021-05-02 15:33:51,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:33:51,909 INFO L225 Difference]: With dead ends: 98 [2021-05-02 15:33:51,909 INFO L226 Difference]: Without dead ends: 86 [2021-05-02 15:33:51,909 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 369.3ms TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-05-02 15:33:51,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-05-02 15:33:51,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2021-05-02 15:33:51,922 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 15:33:51,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 109 transitions. [2021-05-02 15:33:51,923 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 109 transitions. Word has length 72 [2021-05-02 15:33:51,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:33:51,924 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 109 transitions. [2021-05-02 15:33:51,924 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 11 states have internal predecessors, (25), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 15:33:51,924 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 109 transitions. [2021-05-02 15:33:51,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-02 15:33:51,925 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:33:51,925 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 15:33:52,128 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:33:52,129 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:33:52,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:33:52,129 INFO L82 PathProgramCache]: Analyzing trace with hash 680531353, now seen corresponding path program 1 times [2021-05-02 15:33:52,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:33:52,130 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026801941] [2021-05-02 15:33:52,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:33:52,137 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:33:52,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [619904470] [2021-05-02 15:33:52,138 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 15:33:52,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:33:52,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 52 conjunts are in the unsatisfiable core [2021-05-02 15:33:52,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:33:52,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:52,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:52,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:52,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:52,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:52,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:52,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:52,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:52,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:52,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:52,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:52,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:52,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:52,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:52,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:52,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:52,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:52,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:52,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:52,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:52,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:52,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:52,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:52,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:52,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:52,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:52,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:52,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:53,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:53,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:53,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:53,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:53,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:53,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:53,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:53,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:53,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:53,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:53,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:53,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:53,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:53,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:53,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:53,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:53,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:53,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:53,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:53,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:53,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:53,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:53,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:53,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:53,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:33:53,471 WARN L159 QuantifierPusher]: Ignoring assumption.