/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/hard-u_valuebound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 03:24:27,202 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 03:24:27,204 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 03:24:27,235 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 03:24:27,250 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 03:24:27,252 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 03:24:27,253 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 03:24:27,254 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 03:24:27,255 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 03:24:27,256 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 03:24:27,258 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 03:24:27,261 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 03:24:27,279 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 03:24:27,280 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 03:24:27,281 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 03:24:27,281 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 03:24:27,282 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 03:24:27,287 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 03:24:27,288 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 03:24:27,288 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 03:24:27,289 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 03:24:27,303 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 03:24:27,303 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 03:24:27,304 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-06 03:24:27,304 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-06 03:24:27,304 INFO L138 SettingsManager]: * Use SBE=true [2021-05-06 03:24:27,304 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 03:24:27,305 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 03:24:27,305 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 03:24:27,305 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 03:24:27,305 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 03:24:27,305 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 03:24:27,305 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 03:24:27,305 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 03:24:27,305 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 03:24:27,305 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 03:24:27,306 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 03:24:27,306 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 03:24:27,306 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 03:24:27,306 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 03:24:27,306 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 03:24:27,306 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 03:24:27,306 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 03:24:27,306 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-06 03:24:27,307 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-06 03:24:27,307 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 03:24:27,307 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-06 03:24:27,307 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 03:24:27,307 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-06 03:24:27,307 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 03:24:27,534 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 03:24:27,554 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 03:24:27,556 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 03:24:27,556 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 03:24:27,559 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 03:24:27,559 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-u_valuebound10.c [2021-05-06 03:24:27,609 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a5ab7fbd0/8d9bf803cd0b4a84aa336e18c0d35956/FLAG62eea320e [2021-05-06 03:24:27,938 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 03:24:27,938 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-u_valuebound10.c [2021-05-06 03:24:27,942 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a5ab7fbd0/8d9bf803cd0b4a84aa336e18c0d35956/FLAG62eea320e [2021-05-06 03:24:27,953 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a5ab7fbd0/8d9bf803cd0b4a84aa336e18c0d35956 [2021-05-06 03:24:27,955 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 03:24:27,956 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 03:24:27,957 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 03:24:27,957 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 03:24:27,960 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 03:24:27,961 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 03:24:27" (1/1) ... [2021-05-06 03:24:27,962 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d5be64e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:24:27, skipping insertion in model container [2021-05-06 03:24:27,962 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 03:24:27" (1/1) ... [2021-05-06 03:24:27,967 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 03:24:27,981 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 03:24:28,095 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-u_valuebound10.c[545,558] [2021-05-06 03:24:28,116 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 03:24:28,121 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 03:24:28,155 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-u_valuebound10.c[545,558] [2021-05-06 03:24:28,159 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 03:24:28,179 INFO L208 MainTranslator]: Completed translation [2021-05-06 03:24:28,180 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:24:28 WrapperNode [2021-05-06 03:24:28,180 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 03:24:28,181 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 03:24:28,181 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 03:24:28,182 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 03:24:28,188 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:24:28" (1/1) ... [2021-05-06 03:24:28,189 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:24:28" (1/1) ... [2021-05-06 03:24:28,199 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:24:28" (1/1) ... [2021-05-06 03:24:28,200 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:24:28" (1/1) ... [2021-05-06 03:24:28,211 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:24:28" (1/1) ... [2021-05-06 03:24:28,214 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:24:28" (1/1) ... [2021-05-06 03:24:28,215 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:24:28" (1/1) ... [2021-05-06 03:24:28,216 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 03:24:28,216 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 03:24:28,217 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 03:24:28,217 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 03:24:28,220 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:24:28" (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 03:24:28,284 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 03:24:28,285 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 03:24:28,285 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 03:24:28,285 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 03:24:28,285 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 03:24:28,286 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 03:24:28,286 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 03:24:28,286 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 03:24:28,286 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 03:24:28,286 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 03:24:28,286 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-06 03:24:28,286 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 03:24:28,287 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 03:24:28,287 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 03:24:28,287 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 03:24:28,288 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 03:24:28,288 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 03:24:28,288 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 03:24:28,288 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 03:24:28,288 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 03:24:28,477 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 03:24:28,477 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-06 03:24:28,478 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 03:24:28 BoogieIcfgContainer [2021-05-06 03:24:28,478 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 03:24:28,479 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 03:24:28,479 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 03:24:28,481 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 03:24:28,481 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 03:24:27" (1/3) ... [2021-05-06 03:24:28,481 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65532d84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 03:24:28, skipping insertion in model container [2021-05-06 03:24:28,482 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:24:28" (2/3) ... [2021-05-06 03:24:28,482 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65532d84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 03:24:28, skipping insertion in model container [2021-05-06 03:24:28,482 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 03:24:28" (3/3) ... [2021-05-06 03:24:28,483 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-u_valuebound10.c [2021-05-06 03:24:28,486 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-06 03:24:28,488 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 03:24:28,498 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 03:24:28,519 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 03:24:28,519 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 03:24:28,519 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-06 03:24:28,519 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 03:24:28,519 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 03:24:28,519 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 03:24:28,519 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 03:24:28,519 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 03:24:28,528 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-06 03:24:28,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 03:24:28,532 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:24:28,532 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:24:28,532 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:24:28,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:24:28,536 INFO L82 PathProgramCache]: Analyzing trace with hash -1784424332, now seen corresponding path program 1 times [2021-05-06 03:24:28,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:24:28,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481194064] [2021-05-06 03:24:28,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:24:28,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:24:28,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 03:24:28,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:24:28,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 03:24:28,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:24:28,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 03:24:28,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:24:28,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-06 03:24:28,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:24:28,750 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 03:24:28,751 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:24:28,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481194064] [2021-05-06 03:24:28,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481194064] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:24:28,753 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:24:28,753 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 03:24:28,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450214051] [2021-05-06 03:24:28,756 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 03:24:28,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:24:28,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 03:24:28,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 03:24:28,766 INFO L87 Difference]: Start difference. First operand has 38 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 03:24:28,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:24:28,894 INFO L93 Difference]: Finished difference Result 69 states and 110 transitions. [2021-05-06 03:24:28,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 03:24:28,896 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2021-05-06 03:24:28,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:24:28,901 INFO L225 Difference]: With dead ends: 69 [2021-05-06 03:24:28,901 INFO L226 Difference]: Without dead ends: 33 [2021-05-06 03:24:28,903 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 46.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 03:24:28,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-06 03:24:28,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-05-06 03:24:28,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 03:24:28,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2021-05-06 03:24:28,929 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 28 [2021-05-06 03:24:28,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:24:28,929 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2021-05-06 03:24:28,929 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 03:24:28,929 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2021-05-06 03:24:28,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 03:24:28,930 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:24:28,930 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:24:28,930 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 03:24:28,930 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:24:28,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:24:28,931 INFO L82 PathProgramCache]: Analyzing trace with hash 1361835634, now seen corresponding path program 1 times [2021-05-06 03:24:28,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:24:28,931 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563644680] [2021-05-06 03:24:28,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:24:28,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:24:29,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 03:24:29,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:24:29,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 03:24:29,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:24:29,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 03:24:29,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:24:29,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-06 03:24:29,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:24:29,060 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 03:24:29,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:24:29,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563644680] [2021-05-06 03:24:29,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563644680] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:24:29,060 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:24:29,060 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 03:24:29,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025269321] [2021-05-06 03:24:29,061 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 03:24:29,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:24:29,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 03:24:29,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 03:24:29,062 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-06 03:24:29,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:24:29,361 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions. [2021-05-06 03:24:29,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 03:24:29,362 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 28 [2021-05-06 03:24:29,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:24:29,363 INFO L225 Difference]: With dead ends: 46 [2021-05-06 03:24:29,363 INFO L226 Difference]: Without dead ends: 44 [2021-05-06 03:24:29,364 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 131.8ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-06 03:24:29,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-06 03:24:29,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2021-05-06 03:24:29,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 12 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 03:24:29,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2021-05-06 03:24:29,374 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 28 [2021-05-06 03:24:29,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:24:29,374 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2021-05-06 03:24:29,374 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-06 03:24:29,374 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2021-05-06 03:24:29,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-06 03:24:29,375 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:24:29,375 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:24:29,375 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 03:24:29,375 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:24:29,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:24:29,375 INFO L82 PathProgramCache]: Analyzing trace with hash 1382067636, now seen corresponding path program 1 times [2021-05-06 03:24:29,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:24:29,376 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497224105] [2021-05-06 03:24:29,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:24:29,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:24:29,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 03:24:29,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:24:29,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 03:24:29,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:24:29,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 03:24:29,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:24:29,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-06 03:24:29,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:24:29,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-05-06 03:24:29,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:24:29,589 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 03:24:29,589 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:24:29,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497224105] [2021-05-06 03:24:29,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497224105] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:24:29,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:24:29,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 03:24:29,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955175033] [2021-05-06 03:24:29,590 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 03:24:29,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:24:29,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 03:24:29,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 03:24:29,591 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 03:24:29,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:24:29,826 INFO L93 Difference]: Finished difference Result 50 states and 63 transitions. [2021-05-06 03:24:29,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 03:24:29,827 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-05-06 03:24:29,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:24:29,829 INFO L225 Difference]: With dead ends: 50 [2021-05-06 03:24:29,829 INFO L226 Difference]: Without dead ends: 48 [2021-05-06 03:24:29,830 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 135.7ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-06 03:24:29,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-06 03:24:29,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2021-05-06 03:24:29,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 12 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 03:24:29,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2021-05-06 03:24:29,847 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 33 [2021-05-06 03:24:29,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:24:29,848 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2021-05-06 03:24:29,848 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 03:24:29,848 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2021-05-06 03:24:29,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-06 03:24:29,849 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:24:29,850 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:24:29,850 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-06 03:24:29,850 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:24:29,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:24:29,850 INFO L82 PathProgramCache]: Analyzing trace with hash -1455208590, now seen corresponding path program 1 times [2021-05-06 03:24:29,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:24:29,851 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846632377] [2021-05-06 03:24:29,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:24:29,876 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:24:29,876 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1194938869] [2021-05-06 03:24:29,876 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 03:24:29,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:24:29,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 03:24:29,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:24:30,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:24:30,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:24:30,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:24:30,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:24:30,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:24:30,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:24:30,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:24:30,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:24:30,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:24:30,244 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-05-06 03:24:30,245 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:24:30,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846632377] [2021-05-06 03:24:30,245 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:24:30,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194938869] [2021-05-06 03:24:30,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194938869] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:24:30,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:24:30,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 03:24:30,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182267212] [2021-05-06 03:24:30,246 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 03:24:30,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:24:30,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 03:24:30,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 03:24:30,246 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-06 03:24:32,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:24:32,553 INFO L93 Difference]: Finished difference Result 64 states and 83 transitions. [2021-05-06 03:24:32,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 03:24:32,553 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 38 [2021-05-06 03:24:32,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:24:32,554 INFO L225 Difference]: With dead ends: 64 [2021-05-06 03:24:32,554 INFO L226 Difference]: Without dead ends: 61 [2021-05-06 03:24:32,555 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 52.7ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-06 03:24:32,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-05-06 03:24:32,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 55. [2021-05-06 03:24:32,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 30 states have (on average 1.2) internal successors, (36), 32 states have internal predecessors, (36), 18 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-06 03:24:32,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 69 transitions. [2021-05-06 03:24:32,563 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 69 transitions. Word has length 38 [2021-05-06 03:24:32,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:24:32,564 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 69 transitions. [2021-05-06 03:24:32,564 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-06 03:24:32,564 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 69 transitions. [2021-05-06 03:24:32,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-06 03:24:32,565 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:24:32,565 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:24:32,776 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:24:32,777 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:24:32,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:24:32,777 INFO L82 PathProgramCache]: Analyzing trace with hash -1688067263, now seen corresponding path program 1 times [2021-05-06 03:24:32,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:24:32,778 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283046175] [2021-05-06 03:24:32,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:24:32,787 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:24:32,787 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1413677802] [2021-05-06 03:24:32,787 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 03:24:32,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:24:32,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 03:24:32,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:24:32,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:24:32,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:24:32,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:24:32,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:24:32,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:24:32,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:24:32,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:24:32,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:24:32,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:24:32,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:24:33,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:24:33,016 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-05-06 03:24:33,016 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:24:33,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283046175] [2021-05-06 03:24:33,016 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:24:33,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413677802] [2021-05-06 03:24:33,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413677802] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:24:33,016 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:24:33,016 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 03:24:33,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602464475] [2021-05-06 03:24:33,017 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 03:24:33,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:24:33,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 03:24:33,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 03:24:33,017 INFO L87 Difference]: Start difference. First operand 55 states and 69 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 03:24:33,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:24:33,263 INFO L93 Difference]: Finished difference Result 76 states and 92 transitions. [2021-05-06 03:24:33,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 03:24:33,263 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 45 [2021-05-06 03:24:33,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:24:33,264 INFO L225 Difference]: With dead ends: 76 [2021-05-06 03:24:33,264 INFO L226 Difference]: Without dead ends: 73 [2021-05-06 03:24:33,265 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 80.5ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-06 03:24:33,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-05-06 03:24:33,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2021-05-06 03:24:33,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 42 states have (on average 1.1666666666666667) internal successors, (49), 44 states have internal predecessors, (49), 20 states have call successors, (20), 10 states have call predecessors, (20), 9 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-06 03:24:33,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 87 transitions. [2021-05-06 03:24:33,273 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 87 transitions. Word has length 45 [2021-05-06 03:24:33,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:24:33,274 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 87 transitions. [2021-05-06 03:24:33,274 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 03:24:33,274 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 87 transitions. [2021-05-06 03:24:33,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-06 03:24:33,275 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:24:33,275 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:24:33,488 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:24:33,489 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:24:33,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:24:33,489 INFO L82 PathProgramCache]: Analyzing trace with hash -1471734606, now seen corresponding path program 1 times [2021-05-06 03:24:33,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:24:33,490 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935569400] [2021-05-06 03:24:33,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:24:33,496 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:24:33,496 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [71399986] [2021-05-06 03:24:33,496 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 03:24:33,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:24:33,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-06 03:24:33,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:24:33,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:24:33,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:24:33,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:24:33,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:24:33,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:24:33,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:24:33,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:24:33,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:24:33,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:24:33,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:24:33,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:24:33,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:24:33,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:24:33,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:24:33,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:24:33,901 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-05-06 03:24:33,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:24:33,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935569400] [2021-05-06 03:24:33,903 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:24:33,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71399986] [2021-05-06 03:24:33,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71399986] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:24:33,904 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:24:33,904 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 03:24:33,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282400145] [2021-05-06 03:24:33,904 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 03:24:33,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:24:33,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 03:24:33,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-06 03:24:33,905 INFO L87 Difference]: Start difference. First operand 72 states and 87 transitions. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-06 03:24:38,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:24:38,544 INFO L93 Difference]: Finished difference Result 99 states and 125 transitions. [2021-05-06 03:24:38,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 03:24:38,544 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) Word has length 55 [2021-05-06 03:24:38,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:24:38,546 INFO L225 Difference]: With dead ends: 99 [2021-05-06 03:24:38,546 INFO L226 Difference]: Without dead ends: 91 [2021-05-06 03:24:38,546 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 83.9ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-06 03:24:38,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-05-06 03:24:38,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 85. [2021-05-06 03:24:38,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 49 states have (on average 1.163265306122449) internal successors, (57), 51 states have internal predecessors, (57), 25 states have call successors, (25), 11 states have call predecessors, (25), 10 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2021-05-06 03:24:38,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 105 transitions. [2021-05-06 03:24:38,555 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 105 transitions. Word has length 55 [2021-05-06 03:24:38,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:24:38,556 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 105 transitions. [2021-05-06 03:24:38,556 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-06 03:24:38,556 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 105 transitions. [2021-05-06 03:24:38,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-05-06 03:24:38,556 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:24:38,557 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:24:38,762 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:24:38,763 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:24:38,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:24:38,763 INFO L82 PathProgramCache]: Analyzing trace with hash 1586192473, now seen corresponding path program 1 times [2021-05-06 03:24:38,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:24:38,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456179336] [2021-05-06 03:24:38,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:24:38,783 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:24:38,783 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [427908321] [2021-05-06 03:24:38,783 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