/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/ps4-ll_unwindbound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 04:44:23,878 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 04:44:23,880 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 04:44:23,919 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 04:44:23,949 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 04:44:23,950 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 04:44:23,958 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 04:44:23,962 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 [2021-05-06 04:44:23,990 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 04:44:23,990 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 04:44:23,993 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-06 04:44:23,993 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-06 04:44:23,993 INFO L138 SettingsManager]: * Use SBE=true [2021-05-06 04:44:23,993 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 04:44:23,993 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 04:44:23,994 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 04:44:23,994 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 04:44:23,994 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 04:44:23,995 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 04:44:23,995 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 04:44:23,995 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 04:44:23,995 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 04:44:23,995 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 04:44:23,995 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 04:44:23,995 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 04:44:23,996 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 04:44:23,996 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 04:44:23,996 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 04:44:23,996 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 04:44:23,996 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 04:44:23,996 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-06 04:44:23,996 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-06 04:44:23,997 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 04:44:23,997 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-06 04:44:23,997 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 04:44:23,997 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-06 04:44:23,997 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 04:44:24,296 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 04:44:24,314 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 04:44:24,316 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 04:44:24,316 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 04:44:24,317 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 04:44:24,318 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_unwindbound5.c [2021-05-06 04:44:24,371 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5d6130669/925cf7a974084621a1f528e04176cc34/FLAGac3ccd0f9 [2021-05-06 04:44:24,781 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 04:44:24,781 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_unwindbound5.c [2021-05-06 04:44:24,787 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5d6130669/925cf7a974084621a1f528e04176cc34/FLAGac3ccd0f9 [2021-05-06 04:44:24,803 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5d6130669/925cf7a974084621a1f528e04176cc34 [2021-05-06 04:44:24,806 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 04:44:24,808 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 04:44:24,810 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 04:44:24,810 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 04:44:24,813 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 04:44:24,814 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 04:44:24" (1/1) ... [2021-05-06 04:44:24,815 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35491188 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:44:24, skipping insertion in model container [2021-05-06 04:44:24,815 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 04:44:24" (1/1) ... [2021-05-06 04:44:24,821 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 04:44:24,834 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 04:44:24,973 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/ps4-ll_unwindbound5.c[458,471] [2021-05-06 04:44:24,983 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 04:44:24,990 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 04:44:25,000 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/ps4-ll_unwindbound5.c[458,471] [2021-05-06 04:44:25,006 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 04:44:25,017 INFO L208 MainTranslator]: Completed translation [2021-05-06 04:44:25,017 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:44:25 WrapperNode [2021-05-06 04:44:25,017 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 04:44:25,019 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 04:44:25,019 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 04:44:25,020 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 04:44:25,043 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:44:25" (1/1) ... [2021-05-06 04:44:25,043 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:44:25" (1/1) ... [2021-05-06 04:44:25,048 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:44:25" (1/1) ... [2021-05-06 04:44:25,052 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:44:25" (1/1) ... [2021-05-06 04:44:25,070 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:44:25" (1/1) ... [2021-05-06 04:44:25,073 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:44:25" (1/1) ... [2021-05-06 04:44:25,074 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:44:25" (1/1) ... [2021-05-06 04:44:25,076 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 04:44:25,076 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 04:44:25,076 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 04:44:25,076 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 04:44:25,077 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:44:25" (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 [2021-05-06 04:44:25,148 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 04:44:25,148 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 04:44:25,148 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 04:44:25,149 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 04:44:25,149 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 04:44:25,149 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 04:44:25,149 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 04:44:25,149 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 04:44:25,149 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 04:44:25,150 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 04:44:25,150 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2021-05-06 04:44:25,150 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 04:44:25,151 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 04:44:25,151 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 04:44:25,151 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 04:44:25,151 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 04:44:25,152 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 04:44:25,152 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 04:44:25,152 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 04:44:25,152 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 04:44:25,447 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 04:44:25,447 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 04:44:25,448 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 04:44:25 BoogieIcfgContainer [2021-05-06 04:44:25,448 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 04:44:25,450 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 04:44:25,450 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 04:44:25,452 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 04:44:25,452 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 04:44:24" (1/3) ... [2021-05-06 04:44:25,469 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@712d5d0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 04:44:25, skipping insertion in model container [2021-05-06 04:44:25,469 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 04:44:25" (2/3) ... [2021-05-06 04:44:25,469 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@712d5d0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 04:44:25, skipping insertion in model container [2021-05-06 04:44:25,469 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 04:44:25" (3/3) ... [2021-05-06 04:44:25,471 INFO L111 eAbstractionObserver]: Analyzing ICFG ps4-ll_unwindbound5.c [2021-05-06 04:44:25,475 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-06 04:44:25,478 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 04:44:25,509 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 04:44:25,538 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 04:44:25,538 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 04:44:25,538 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-06 04:44:25,538 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 04:44:25,538 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 04:44:25,538 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 04:44:25,538 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 04:44:25,538 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 04:44:25,554 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 04:44:25,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-06 04:44:25,558 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:25,558 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:25,558 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:25,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:25,562 INFO L82 PathProgramCache]: Analyzing trace with hash -2133548928, now seen corresponding path program 1 times [2021-05-06 04:44:25,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:25,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699517344] [2021-05-06 04:44:25,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:25,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:44:25,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 04:44:25,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:44:25,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 04:44:25,818 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:25,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699517344] [2021-05-06 04:44:25,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699517344] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 04:44:25,820 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 04:44:25,820 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 04:44:25,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804113801] [2021-05-06 04:44:25,824 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 04:44:25,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:25,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 04:44:25,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 04:44:25,839 INFO L87 Difference]: Start difference. First operand has 23 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 04:44:25,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:25,941 INFO L93 Difference]: Finished difference Result 41 states and 55 transitions. [2021-05-06 04:44:25,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 04:44:25,944 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-05-06 04:44:25,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:25,951 INFO L225 Difference]: With dead ends: 41 [2021-05-06 04:44:25,951 INFO L226 Difference]: Without dead ends: 19 [2021-05-06 04:44:25,954 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 67.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 04:44:25,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-05-06 04:44:25,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2021-05-06 04:44:25,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 04:44:25,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2021-05-06 04:44:25,992 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 11 [2021-05-06 04:44:25,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:25,993 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2021-05-06 04:44:25,993 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 04:44:25,994 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2021-05-06 04:44:25,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-06 04:44:25,995 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:25,995 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:25,995 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 04:44:25,996 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:25,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:25,996 INFO L82 PathProgramCache]: Analyzing trace with hash -2118701623, now seen corresponding path program 1 times [2021-05-06 04:44:25,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:25,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547518294] [2021-05-06 04:44:25,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:26,026 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:26,026 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1547370533] [2021-05-06 04:44:26,026 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 [2021-05-06 04:44:26,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:44:26,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 04:44:26,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:26,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:26,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:26,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:26,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:26,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:26,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 04:44:26,256 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:26,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547518294] [2021-05-06 04:44:26,256 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:26,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547370533] [2021-05-06 04:44:26,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547370533] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 04:44:26,257 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 04:44:26,257 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 04:44:26,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853399250] [2021-05-06 04:44:26,258 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 04:44:26,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:26,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 04:44:26,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 04:44:26,259 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 04:44:26,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:26,271 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2021-05-06 04:44:26,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 04:44:26,271 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-06 04:44:26,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:26,272 INFO L225 Difference]: With dead ends: 28 [2021-05-06 04:44:26,272 INFO L226 Difference]: Without dead ends: 20 [2021-05-06 04:44:26,273 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.1ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 04:44:26,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-05-06 04:44:26,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-05-06 04:44:26,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 04:44:26,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2021-05-06 04:44:26,278 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 12 [2021-05-06 04:44:26,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:26,278 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2021-05-06 04:44:26,279 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 04:44:26,279 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2021-05-06 04:44:26,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-06 04:44:26,279 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:26,279 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:26,502 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 04:44:26,503 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:26,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:26,504 INFO L82 PathProgramCache]: Analyzing trace with hash -2116914163, now seen corresponding path program 1 times [2021-05-06 04:44:26,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:26,504 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517891318] [2021-05-06 04:44:26,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:26,519 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:26,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2100843629] [2021-05-06 04:44:26,520 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 [2021-05-06 04:44:26,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:44:26,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 04:44:26,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:26,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:26,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 04:44:26,619 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:26,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517891318] [2021-05-06 04:44:26,619 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:26,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100843629] [2021-05-06 04:44:26,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100843629] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 04:44:26,619 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 04:44:26,620 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 04:44:26,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971774342] [2021-05-06 04:44:26,620 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 04:44:26,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:26,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 04:44:26,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 04:44:26,621 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 04:44:26,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:26,660 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2021-05-06 04:44:26,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 04:44:26,661 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-06 04:44:26,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:26,661 INFO L225 Difference]: With dead ends: 30 [2021-05-06 04:44:26,661 INFO L226 Difference]: Without dead ends: 26 [2021-05-06 04:44:26,662 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.4ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 04:44:26,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-06 04:44:26,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-05-06 04:44:26,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 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) [2021-05-06 04:44:26,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2021-05-06 04:44:26,669 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 12 [2021-05-06 04:44:26,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:26,669 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2021-05-06 04:44:26,669 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 04:44:26,670 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2021-05-06 04:44:26,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-06 04:44:26,670 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:26,670 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:26,893 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:44:26,893 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:26,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:26,894 INFO L82 PathProgramCache]: Analyzing trace with hash -263585780, now seen corresponding path program 1 times [2021-05-06 04:44:26,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:26,894 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275302572] [2021-05-06 04:44:26,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:26,904 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:26,904 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1186455212] [2021-05-06 04:44:26,904 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 [2021-05-06 04:44:26,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:44:26,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 04:44:26,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:26,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:26,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:26,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:27,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:27,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:27,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:27,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:27,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:27,079 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 04:44:27,079 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:27,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275302572] [2021-05-06 04:44:27,080 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:27,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186455212] [2021-05-06 04:44:27,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186455212] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:27,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:27,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-06 04:44:27,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590092673] [2021-05-06 04:44:27,080 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 04:44:27,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:27,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 04:44:27,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 04:44:27,081 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 04:44:27,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:27,118 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2021-05-06 04:44:27,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 04:44:27,118 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2021-05-06 04:44:27,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:27,119 INFO L225 Difference]: With dead ends: 36 [2021-05-06 04:44:27,119 INFO L226 Difference]: Without dead ends: 28 [2021-05-06 04:44:27,120 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 30.8ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 04:44:27,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-05-06 04:44:27,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-05-06 04:44:27,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 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) [2021-05-06 04:44:27,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2021-05-06 04:44:27,125 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 20 [2021-05-06 04:44:27,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:27,125 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2021-05-06 04:44:27,125 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 04:44:27,126 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2021-05-06 04:44:27,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-06 04:44:27,126 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:27,126 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:27,344 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:44:27,345 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:27,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:27,345 INFO L82 PathProgramCache]: Analyzing trace with hash -261798320, now seen corresponding path program 1 times [2021-05-06 04:44:27,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:27,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779447955] [2021-05-06 04:44:27,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:27,352 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:27,352 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1822218430] [2021-05-06 04:44:27,352 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 [2021-05-06 04:44:27,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:44:27,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 04:44:27,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:27,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:27,484 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 04:44:27,484 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:27,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779447955] [2021-05-06 04:44:27,484 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:27,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822218430] [2021-05-06 04:44:27,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822218430] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:27,484 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:27,485 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 04:44:27,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115849295] [2021-05-06 04:44:27,485 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 04:44:27,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:27,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 04:44:27,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 04:44:27,486 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 04:44:27,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:27,528 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2021-05-06 04:44:27,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 04:44:27,528 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2021-05-06 04:44:27,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:27,529 INFO L225 Difference]: With dead ends: 38 [2021-05-06 04:44:27,529 INFO L226 Difference]: Without dead ends: 35 [2021-05-06 04:44:27,529 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.6ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 04:44:27,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-06 04:44:27,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-06 04:44:27,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 24 states have internal predecessors, (26), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 04:44:27,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2021-05-06 04:44:27,536 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 20 [2021-05-06 04:44:27,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:27,536 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2021-05-06 04:44:27,537 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 04:44:27,537 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2021-05-06 04:44:27,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-06 04:44:27,537 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:27,537 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:27,758 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:44:27,758 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:27,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:27,759 INFO L82 PathProgramCache]: Analyzing trace with hash 891414954, now seen corresponding path program 1 times [2021-05-06 04:44:27,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:27,759 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061993195] [2021-05-06 04:44:27,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:27,768 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:27,768 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [156956274] [2021-05-06 04:44:27,768 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 [2021-05-06 04:44:27,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 04:44:27,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 04:44:27,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:27,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:27,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:27,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:27,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:27,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:27,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:27,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:27,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:27,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:27,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:27,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:28,728 WARN L205 SmtUtils]: Spent 532.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 9 [2021-05-06 04:44:28,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:28,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:28,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:28,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:28,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:28,798 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-06 04:44:28,798 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:28,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061993195] [2021-05-06 04:44:28,798 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:28,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156956274] [2021-05-06 04:44:28,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156956274] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:28,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:28,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 04:44:28,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508285000] [2021-05-06 04:44:28,799 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 04:44:28,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:28,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 04:44:28,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-06 04:44:28,800 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 04:44:28,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:28,905 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2021-05-06 04:44:28,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 04:44:28,906 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 26 [2021-05-06 04:44:28,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:28,906 INFO L225 Difference]: With dead ends: 41 [2021-05-06 04:44:28,906 INFO L226 Difference]: Without dead ends: 34 [2021-05-06 04:44:28,907 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 814.5ms TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-05-06 04:44:28,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-06 04:44:28,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-05-06 04:44:28,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 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) [2021-05-06 04:44:28,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2021-05-06 04:44:28,914 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 26 [2021-05-06 04:44:28,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:28,914 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2021-05-06 04:44:28,914 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 04:44:28,914 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2021-05-06 04:44:28,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 04:44:28,915 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:28,915 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:29,138 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-06 04:44:29,138 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:29,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:29,138 INFO L82 PathProgramCache]: Analyzing trace with hash -1647059121, now seen corresponding path program 2 times [2021-05-06 04:44:29,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:29,139 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138200005] [2021-05-06 04:44:29,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:29,160 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:29,160 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1233118682] [2021-05-06 04:44:29,160 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 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 [2021-05-06 04:44:29,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 04:44:29,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:44:29,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 04:44:29,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:29,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:29,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:29,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:29,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:29,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:29,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:29,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:29,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:29,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:29,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:29,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:29,305 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 04:44:29,306 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:29,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138200005] [2021-05-06 04:44:29,306 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:29,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233118682] [2021-05-06 04:44:29,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233118682] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:29,306 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:29,306 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 04:44:29,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954015336] [2021-05-06 04:44:29,307 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 04:44:29,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:29,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 04:44:29,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 04:44:29,308 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 04:44:29,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:29,351 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2021-05-06 04:44:29,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 04:44:29,351 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2021-05-06 04:44:29,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:29,352 INFO L225 Difference]: With dead ends: 44 [2021-05-06 04:44:29,352 INFO L226 Difference]: Without dead ends: 36 [2021-05-06 04:44:29,353 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 26.9ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-06 04:44:29,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-06 04:44:29,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-05-06 04:44:29,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 24 states have (on average 1.125) internal successors, (27), 25 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) [2021-05-06 04:44:29,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2021-05-06 04:44:29,359 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 28 [2021-05-06 04:44:29,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:29,359 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2021-05-06 04:44:29,359 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 04:44:29,359 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2021-05-06 04:44:29,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 04:44:29,360 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:29,360 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:29,566 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:44:29,567 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:29,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:29,567 INFO L82 PathProgramCache]: Analyzing trace with hash -1645271661, now seen corresponding path program 2 times [2021-05-06 04:44:29,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:29,567 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220336187] [2021-05-06 04:44:29,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:29,575 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:29,575 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [792330718] [2021-05-06 04:44:29,575 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:44:29,659 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 04:44:29,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:44:29,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-06 04:44:29,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:29,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:29,798 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-06 04:44:29,798 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:29,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220336187] [2021-05-06 04:44:29,798 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:29,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792330718] [2021-05-06 04:44:29,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792330718] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:29,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:29,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 04:44:29,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936985563] [2021-05-06 04:44:29,800 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 04:44:29,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:29,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 04:44:29,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-06 04:44:29,801 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 04:44:29,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:29,921 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2021-05-06 04:44:29,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 04:44:29,921 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2021-05-06 04:44:29,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:29,924 INFO L225 Difference]: With dead ends: 46 [2021-05-06 04:44:29,924 INFO L226 Difference]: Without dead ends: 43 [2021-05-06 04:44:29,924 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 64.9ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-06 04:44:29,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-06 04:44:29,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-05-06 04:44:29,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 30 states have internal predecessors, (32), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 04:44:29,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2021-05-06 04:44:29,944 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 28 [2021-05-06 04:44:29,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:29,945 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2021-05-06 04:44:29,945 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 04:44:29,945 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2021-05-06 04:44:29,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-06 04:44:29,947 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:29,947 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:30,147 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:44:30,148 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:30,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:30,149 INFO L82 PathProgramCache]: Analyzing trace with hash 1036651181, now seen corresponding path program 2 times [2021-05-06 04:44:30,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:30,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150563560] [2021-05-06 04:44:30,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:30,156 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:30,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1844592325] [2021-05-06 04:44:30,157 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:44:30,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 04:44:30,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:44:30,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-06 04:44:30,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:30,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:30,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:30,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:30,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:30,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:30,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:30,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:30,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:30,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:30,435 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-06 04:44:30,435 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:30,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150563560] [2021-05-06 04:44:30,435 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:30,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844592325] [2021-05-06 04:44:30,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844592325] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:30,436 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:30,436 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 04:44:30,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781176629] [2021-05-06 04:44:30,436 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 04:44:30,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:30,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 04:44:30,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-05-06 04:44:30,437 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand has 11 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 04:44:30,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:30,589 INFO L93 Difference]: Finished difference Result 49 states and 52 transitions. [2021-05-06 04:44:30,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 04:44:30,590 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 34 [2021-05-06 04:44:30,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:30,592 INFO L225 Difference]: With dead ends: 49 [2021-05-06 04:44:30,592 INFO L226 Difference]: Without dead ends: 42 [2021-05-06 04:44:30,593 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 116.1ms TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-05-06 04:44:30,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-05-06 04:44:30,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-05-06 04:44:30,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 29 states have internal predecessors, (31), 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) [2021-05-06 04:44:30,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2021-05-06 04:44:30,605 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 34 [2021-05-06 04:44:30,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:30,606 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2021-05-06 04:44:30,606 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 04:44:30,606 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2021-05-06 04:44:30,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-06 04:44:30,608 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:30,608 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:30,809 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-06 04:44:30,809 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:30,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:30,810 INFO L82 PathProgramCache]: Analyzing trace with hash 486001554, now seen corresponding path program 3 times [2021-05-06 04:44:30,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:30,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034787765] [2021-05-06 04:44:30,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:30,817 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:30,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1223124823] [2021-05-06 04:44:30,818 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:44:30,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 04:44:30,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:44:30,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 04:44:30,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:30,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:30,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:30,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:30,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:30,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:30,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:30,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:30,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:30,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:30,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:30,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:30,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:30,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:30,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:31,007 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 04:44:31,007 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:31,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034787765] [2021-05-06 04:44:31,007 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:31,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223124823] [2021-05-06 04:44:31,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223124823] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:31,007 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:31,007 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 04:44:31,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760947347] [2021-05-06 04:44:31,008 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 04:44:31,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:31,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 04:44:31,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-06 04:44:31,010 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 04:44:31,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:31,074 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2021-05-06 04:44:31,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 04:44:31,075 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 36 [2021-05-06 04:44:31,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:31,077 INFO L225 Difference]: With dead ends: 52 [2021-05-06 04:44:31,077 INFO L226 Difference]: Without dead ends: 44 [2021-05-06 04:44:31,078 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 34.5ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-05-06 04:44:31,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-06 04:44:31,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-05-06 04:44:31,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 30 states have (on average 1.1) internal successors, (33), 31 states have internal predecessors, (33), 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) [2021-05-06 04:44:31,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2021-05-06 04:44:31,088 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 36 [2021-05-06 04:44:31,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:31,088 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2021-05-06 04:44:31,088 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-06 04:44:31,088 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2021-05-06 04:44:31,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-06 04:44:31,090 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:31,090 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:31,291 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:44:31,291 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:31,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:31,292 INFO L82 PathProgramCache]: Analyzing trace with hash 487789014, now seen corresponding path program 3 times [2021-05-06 04:44:31,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:31,292 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62179333] [2021-05-06 04:44:31,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:31,311 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:31,311 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [385500258] [2021-05-06 04:44:31,311 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:44:31,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-06 04:44:31,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:44:31,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 04:44:31,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:31,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:31,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:31,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:31,478 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-06 04:44:31,478 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:31,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62179333] [2021-05-06 04:44:31,479 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:31,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385500258] [2021-05-06 04:44:31,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385500258] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:31,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:31,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 04:44:31,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592800703] [2021-05-06 04:44:31,479 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 04:44:31,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:31,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 04:44:31,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-06 04:44:31,480 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 04:44:31,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:31,525 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2021-05-06 04:44:31,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 04:44:31,525 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 36 [2021-05-06 04:44:31,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:31,526 INFO L225 Difference]: With dead ends: 50 [2021-05-06 04:44:31,526 INFO L226 Difference]: Without dead ends: 45 [2021-05-06 04:44:31,527 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 37.6ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-06 04:44:31,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-06 04:44:31,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-05-06 04:44:31,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 32 states have (on average 1.0625) internal successors, (34), 32 states have internal predecessors, (34), 7 states have call successors, (7), 7 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 04:44:31,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2021-05-06 04:44:31,532 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 36 [2021-05-06 04:44:31,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:31,532 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2021-05-06 04:44:31,532 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 04:44:31,532 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2021-05-06 04:44:31,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-06 04:44:31,532 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:31,533 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:31,736 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:44:31,737 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:31,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:31,737 INFO L82 PathProgramCache]: Analyzing trace with hash -1383171920, now seen corresponding path program 3 times [2021-05-06 04:44:31,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:31,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488176006] [2021-05-06 04:44:31,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:31,744 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:31,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2030733901] [2021-05-06 04:44:31,745 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:44:31,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 04:44:31,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:44:31,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-06 04:44:31,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:31,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:31,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:31,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:31,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:31,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:31,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:31,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:31,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:31,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:31,993 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 8 proven. 24 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 04:44:31,993 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:31,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488176006] [2021-05-06 04:44:31,993 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:31,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030733901] [2021-05-06 04:44:31,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030733901] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:31,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:31,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 04:44:31,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125692087] [2021-05-06 04:44:31,994 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 04:44:31,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:31,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 04:44:31,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-05-06 04:44:31,995 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 04:44:32,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:32,072 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2021-05-06 04:44:32,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 04:44:32,073 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 42 [2021-05-06 04:44:32,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:32,074 INFO L225 Difference]: With dead ends: 52 [2021-05-06 04:44:32,074 INFO L226 Difference]: Without dead ends: 47 [2021-05-06 04:44:32,075 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 65.2ms TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-06 04:44:32,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-05-06 04:44:32,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-05-06 04:44:32,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 33 states have internal predecessors, (35), 8 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 04:44:32,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2021-05-06 04:44:32,087 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 42 [2021-05-06 04:44:32,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:32,087 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2021-05-06 04:44:32,087 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 04:44:32,087 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2021-05-06 04:44:32,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-06 04:44:32,090 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:32,090 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:32,313 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-06 04:44:32,313 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:32,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:32,314 INFO L82 PathProgramCache]: Analyzing trace with hash -1386691371, now seen corresponding path program 4 times [2021-05-06 04:44:32,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:32,314 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302464982] [2021-05-06 04:44:32,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:32,318 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:32,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [377038792] [2021-05-06 04:44:32,318 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:44:32,366 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 04:44:32,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:44:32,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 04:44:32,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:32,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:32,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:32,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:32,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:32,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:32,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:32,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:32,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:32,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:32,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:32,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:32,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:32,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:32,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:32,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:32,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:32,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:32,475 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 04:44:32,475 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:32,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302464982] [2021-05-06 04:44:32,475 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:32,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377038792] [2021-05-06 04:44:32,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377038792] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:32,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:32,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 04:44:32,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759848797] [2021-05-06 04:44:32,476 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 04:44:32,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:32,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 04:44:32,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-06 04:44:32,476 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 7 states have call successors, (7), 7 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 04:44:32,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:32,548 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2021-05-06 04:44:32,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 04:44:32,548 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 7 states have call successors, (7), 7 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 44 [2021-05-06 04:44:32,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:32,549 INFO L225 Difference]: With dead ends: 58 [2021-05-06 04:44:32,549 INFO L226 Difference]: Without dead ends: 53 [2021-05-06 04:44:32,549 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 48.6ms TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-05-06 04:44:32,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-05-06 04:44:32,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-05-06 04:44:32,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 38 states have (on average 1.0526315789473684) internal successors, (40), 38 states have internal predecessors, (40), 8 states have call successors, (8), 8 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 04:44:32,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2021-05-06 04:44:32,554 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 44 [2021-05-06 04:44:32,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:32,554 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2021-05-06 04:44:32,554 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 7 states have call successors, (7), 7 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-06 04:44:32,554 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2021-05-06 04:44:32,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-06 04:44:32,555 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:32,555 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:32,777 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-06 04:44:32,778 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:32,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:32,778 INFO L82 PathProgramCache]: Analyzing trace with hash 1037185971, now seen corresponding path program 4 times [2021-05-06 04:44:32,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:32,778 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314834354] [2021-05-06 04:44:32,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:32,783 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:32,784 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [283280652] [2021-05-06 04:44:32,784 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:44:32,883 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 04:44:32,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 04:44:32,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-06 04:44:32,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 04:44:33,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:33,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:33,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:33,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:33,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:33,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:33,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:33,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:33,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 04:44:33,067 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 10 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-06 04:44:33,068 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 04:44:33,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314834354] [2021-05-06 04:44:33,068 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 04:44:33,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283280652] [2021-05-06 04:44:33,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283280652] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 04:44:33,068 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 04:44:33,068 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 04:44:33,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060829524] [2021-05-06 04:44:33,069 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 04:44:33,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 04:44:33,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 04:44:33,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-05-06 04:44:33,069 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 04:44:33,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 04:44:33,164 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2021-05-06 04:44:33,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 04:44:33,165 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 50 [2021-05-06 04:44:33,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 04:44:33,165 INFO L225 Difference]: With dead ends: 60 [2021-05-06 04:44:33,165 INFO L226 Difference]: Without dead ends: 55 [2021-05-06 04:44:33,167 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 89.1ms TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-05-06 04:44:33,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-06 04:44:33,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-05-06 04:44:33,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 39 states have internal predecessors, (41), 9 states have call successors, (9), 8 states have call predecessors, (9), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 04:44:33,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2021-05-06 04:44:33,177 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 50 [2021-05-06 04:44:33,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 04:44:33,177 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2021-05-06 04:44:33,177 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-06 04:44:33,178 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2021-05-06 04:44:33,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-06 04:44:33,178 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 04:44:33,178 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 04:44:33,392 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-06 04:44:33,393 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 04:44:33,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 04:44:33,393 INFO L82 PathProgramCache]: Analyzing trace with hash 999934744, now seen corresponding path program 5 times [2021-05-06 04:44:33,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 04:44:33,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343090378] [2021-05-06 04:44:33,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 04:44:33,398 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 04:44:33,398 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2119174680] [2021-05-06 04:44:33,398 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:44:33,476 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-06 04:44:33,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-05-06 04:44:33,476 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-06 04:44:33,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-06 04:44:33,551 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-06 04:44:33,602 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-06 04:44:33,602 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-06 04:44:33,802 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 04:44:33,836 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 04:44:33 BoogieIcfgContainer [2021-05-06 04:44:33,836 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 04:44:33,837 INFO L168 Benchmark]: Toolchain (without parser) took 9029.22 ms. Allocated memory was 183.5 MB in the beginning and 235.9 MB in the end (delta: 52.4 MB). Free memory was 148.9 MB in the beginning and 172.9 MB in the end (delta: -24.0 MB). Peak memory consumption was 28.5 MB. Max. memory is 8.0 GB. [2021-05-06 04:44:33,837 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 183.5 MB. Free memory is still 165.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 04:44:33,837 INFO L168 Benchmark]: CACSL2BoogieTranslator took 207.32 ms. Allocated memory is still 183.5 MB. Free memory was 148.7 MB in the beginning and 138.9 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-06 04:44:33,837 INFO L168 Benchmark]: Boogie Preprocessor took 56.72 ms. Allocated memory is still 183.5 MB. Free memory was 138.9 MB in the beginning and 167.3 MB in the end (delta: -28.3 MB). Peak memory consumption was 3.2 MB. Max. memory is 8.0 GB. [2021-05-06 04:44:33,837 INFO L168 Benchmark]: RCFGBuilder took 372.23 ms. Allocated memory is still 183.5 MB. Free memory was 167.3 MB in the beginning and 152.6 MB in the end (delta: 14.7 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-05-06 04:44:33,837 INFO L168 Benchmark]: TraceAbstraction took 8386.73 ms. Allocated memory was 183.5 MB in the beginning and 235.9 MB in the end (delta: 52.4 MB). Free memory was 152.1 MB in the beginning and 172.9 MB in the end (delta: -20.8 MB). Peak memory consumption was 32.7 MB. Max. memory is 8.0 GB. [2021-05-06 04:44:33,838 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 183.5 MB. Free memory is still 165.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 207.32 ms. Allocated memory is still 183.5 MB. Free memory was 148.7 MB in the beginning and 138.9 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 56.72 ms. Allocated memory is still 183.5 MB. Free memory was 138.9 MB in the beginning and 167.3 MB in the end (delta: -28.3 MB). Peak memory consumption was 3.2 MB. Max. memory is 8.0 GB. * RCFGBuilder took 372.23 ms. Allocated memory is still 183.5 MB. Free memory was 167.3 MB in the beginning and 152.6 MB in the end (delta: 14.7 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 8386.73 ms. Allocated memory was 183.5 MB in the beginning and 235.9 MB in the end (delta: 52.4 MB). Free memory was 152.1 MB in the beginning and 172.9 MB in the end (delta: -20.8 MB). Peak memory consumption was 32.7 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 12]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L17] int counter = 0; VAL [\old(counter)=15, counter=0] [L19] short k; [L20] long long y, x, c; [L21] k = __VERIFIER_nondet_short() [L23] y = 0 [L24] x = 0 [L25] c = 0 VAL [\old(counter)=0, c=0, counter=0, k=6, x=0, y=0] [L27] EXPR counter++ VAL [\old(counter)=0, c=0, counter=1, counter++=0, k=6, x=0, y=0] [L27] COND TRUE counter++<5 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(counter)=0, c=0, counter=1, k=6, x=0, y=0] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [\old(counter)=0, c=1, counter=1, k=6, x=1, y=1] [L27] EXPR counter++ VAL [\old(counter)=0, c=1, counter=2, counter++=1, k=6, x=1, y=1] [L27] COND TRUE counter++<5 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(counter)=0, c=1, counter=2, k=6, x=1, y=1] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [\old(counter)=0, c=2, counter=2, k=6, x=9, y=2] [L27] EXPR counter++ VAL [\old(counter)=0, c=2, counter=3, counter++=2, k=6, x=9, y=2] [L27] COND TRUE counter++<5 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, \old(counter)=0, counter=3] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=3] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(counter)=0, c=2, counter=3, k=6, x=9, y=2] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [\old(counter)=0, c=3, counter=3, k=6, x=36, y=3] [L27] EXPR counter++ VAL [\old(counter)=0, c=3, counter=4, counter++=3, k=6, x=36, y=3] [L27] COND TRUE counter++<5 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, \old(counter)=0, counter=4] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=4] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(counter)=0, c=3, counter=4, k=6, x=36, y=3] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [\old(counter)=0, c=4, counter=4, k=6, x=100, y=4] [L27] EXPR counter++ VAL [\old(counter)=0, c=4, counter=5, counter++=4, k=6, x=100, y=4] [L27] COND TRUE counter++<5 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(counter)=0, c=4, counter=5, k=6, x=100, y=4] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [\old(counter)=0, c=5, counter=5, k=6, x=225, y=5] [L27] EXPR counter++ VAL [\old(counter)=0, c=5, counter=6, counter++=5, k=6, x=225, y=5] [L27] COND FALSE !(counter++<5) [L37] CALL __VERIFIER_assert(k*y - (y*y) == 0) VAL [\old(cond)=0, \old(counter)=0, counter=6] [L10] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=6] [L12] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=6] - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 30 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 8271.6ms, OverallIterations: 15, TraceHistogramMax: 6, EmptinessCheckTime: 22.3ms, AutomataDifference: 1070.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 12.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 307 SDtfs, 90 SDslu, 1146 SDs, 0 SdLazy, 611 SolverSat, 46 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 530.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 405 GetRequests, 305 SyntacticMatches, 2 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1474.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=55occurred in iteration=14, InterpolantAutomatonStates: 108, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 136.5ms AutomataMinimizationTime, 14 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 125.2ms SsaConstructionTime, 483.1ms SatisfiabilityAnalysisTime, 2625.6ms InterpolantComputationTime, 451 NumberOfCodeBlocks, 435 NumberOfCodeBlocksAsserted, 32 NumberOfCheckSat, 385 ConstructedInterpolants, 0 QuantifiedInterpolants, 1520 SizeOfPredicates, 34 NumberOfNonLiveVariables, 1909 ConjunctsInSsa, 190 ConjunctsInUnsatCore, 14 InterpolantComputations, 3 PerfectInterpolantSequences, 172/370 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...