/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/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/hard-u_valuebound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 09:08:18,815 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 09:08:18,818 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 09:08:18,848 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 09:08:18,876 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 09:08:18,878 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 09:08:18,880 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 09:08:18,881 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 09:08:18,884 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 09:08:18,884 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 09:08:18,888 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 09:08:18,893 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 09:08:18,895 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 09:08:18,896 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 09:08:18,899 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 09:08:18,901 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 09:08:18,905 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 09:08:18,913 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 09:08:18,913 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 09:08:18,914 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 09:08:18,917 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 09:08:18,934 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 09:08:18,934 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 09:08:18,936 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 09:08:18,937 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 09:08:18,937 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 09:08:18,937 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 09:08:18,937 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 09:08:18,937 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 09:08:18,937 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 09:08:18,937 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 09:08:18,938 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 09:08:18,938 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 09:08:18,939 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 09:08:18,939 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 09:08:18,939 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 09:08:18,939 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 09:08:18,939 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 09:08:18,939 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 09:08:18,939 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 09:08:18,940 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 09:08:18,940 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 09:08:18,941 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 09:08:18,941 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 09:08:19,214 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 09:08:19,236 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 09:08:19,239 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 09:08:19,240 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 09:08:19,241 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 09:08:19,241 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-u_valuebound50.c [2021-05-06 09:08:19,294 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b30569690/92d452e7090f4fe7aeba3ae1fa78f7d2/FLAG8007d0103 [2021-05-06 09:08:19,684 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 09:08:19,684 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-u_valuebound50.c [2021-05-06 09:08:19,689 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b30569690/92d452e7090f4fe7aeba3ae1fa78f7d2/FLAG8007d0103 [2021-05-06 09:08:19,711 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b30569690/92d452e7090f4fe7aeba3ae1fa78f7d2 [2021-05-06 09:08:19,713 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 09:08:19,715 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 09:08:19,724 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 09:08:19,724 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 09:08:19,727 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 09:08:19,728 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 09:08:19" (1/1) ... [2021-05-06 09:08:19,729 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22f503cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:08:19, skipping insertion in model container [2021-05-06 09:08:19,729 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 09:08:19" (1/1) ... [2021-05-06 09:08:19,736 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 09:08:19,755 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 09:08:19,897 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_valuebound50.c[545,558] [2021-05-06 09:08:19,922 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 09:08:19,930 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 09:08:19,943 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_valuebound50.c[545,558] [2021-05-06 09:08:19,958 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 09:08:19,972 INFO L208 MainTranslator]: Completed translation [2021-05-06 09:08:19,972 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:08:19 WrapperNode [2021-05-06 09:08:19,972 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 09:08:19,974 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 09:08:19,974 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 09:08:19,974 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 09:08:19,985 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:08:19" (1/1) ... [2021-05-06 09:08:19,985 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:08:19" (1/1) ... [2021-05-06 09:08:20,015 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:08:19" (1/1) ... [2021-05-06 09:08:20,015 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:08:19" (1/1) ... [2021-05-06 09:08:20,041 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:08:19" (1/1) ... [2021-05-06 09:08:20,046 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:08:19" (1/1) ... [2021-05-06 09:08:20,053 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:08:19" (1/1) ... [2021-05-06 09:08:20,055 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 09:08:20,056 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 09:08:20,056 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 09:08:20,056 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 09:08:20,056 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:08:19" (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 09:08:20,129 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 09:08:20,129 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 09:08:20,130 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 09:08:20,130 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 09:08:20,130 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 09:08:20,130 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 09:08:20,130 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 09:08:20,130 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 09:08:20,131 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 09:08:20,131 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 09:08:20,131 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-06 09:08:20,131 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 09:08:20,131 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 09:08:20,132 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 09:08:20,132 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 09:08:20,132 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 09:08:20,132 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 09:08:20,132 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 09:08:20,133 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 09:08:20,133 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 09:08:20,401 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 09:08:20,402 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-06 09:08:20,403 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 09:08:20 BoogieIcfgContainer [2021-05-06 09:08:20,403 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 09:08:20,404 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 09:08:20,404 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 09:08:20,405 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 09:08:20,407 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 09:08:20" (1/1) ... [2021-05-06 09:08:20,421 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 09:08:20 BasicIcfg [2021-05-06 09:08:20,421 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 09:08:20,423 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 09:08:20,423 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 09:08:20,425 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 09:08:20,425 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 09:08:19" (1/4) ... [2021-05-06 09:08:20,426 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3918e5e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 09:08:20, skipping insertion in model container [2021-05-06 09:08:20,426 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:08:19" (2/4) ... [2021-05-06 09:08:20,426 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3918e5e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 09:08:20, skipping insertion in model container [2021-05-06 09:08:20,427 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 09:08:20" (3/4) ... [2021-05-06 09:08:20,427 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3918e5e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 09:08:20, skipping insertion in model container [2021-05-06 09:08:20,427 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 09:08:20" (4/4) ... [2021-05-06 09:08:20,428 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-u_valuebound50.cJordan [2021-05-06 09:08:20,433 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 09:08:20,436 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 09:08:20,451 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 09:08:20,467 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 09:08:20,467 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 09:08:20,468 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 09:08:20,468 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 09:08:20,468 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 09:08:20,468 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 09:08:20,468 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 09:08:20,468 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 09:08:20,479 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 09:08:20,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 09:08:20,485 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:08:20,486 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 09:08:20,486 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:08:20,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:08:20,491 INFO L82 PathProgramCache]: Analyzing trace with hash 1011787902, now seen corresponding path program 1 times [2021-05-06 09:08:20,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:08:20,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261961642] [2021-05-06 09:08:20,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:08:20,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:08:20,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 09:08:20,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:08:20,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 09:08:20,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:08:20,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 09:08:20,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:08:20,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-06 09:08:20,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:08:20,828 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 09:08:20,828 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:08:20,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261961642] [2021-05-06 09:08:20,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261961642] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 09:08:20,830 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 09:08:20,830 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 09:08:20,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072182182] [2021-05-06 09:08:20,835 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 09:08:20,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:08:20,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 09:08:20,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 09:08:20,858 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 09:08:21,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:08:21,049 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2021-05-06 09:08:21,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 09:08:21,050 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 09:08:21,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:08:21,055 INFO L225 Difference]: With dead ends: 38 [2021-05-06 09:08:21,056 INFO L226 Difference]: Without dead ends: 33 [2021-05-06 09:08:21,057 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 54.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 09:08:21,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-06 09:08:21,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-05-06 09:08:21,092 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 09:08:21,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2021-05-06 09:08:21,095 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 28 [2021-05-06 09:08:21,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:08:21,097 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2021-05-06 09:08:21,097 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 09:08:21,097 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2021-05-06 09:08:21,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 09:08:21,099 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:08:21,099 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 09:08:21,099 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 09:08:21,099 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:08:21,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:08:21,100 INFO L82 PathProgramCache]: Analyzing trace with hash -1710049411, now seen corresponding path program 1 times [2021-05-06 09:08:21,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:08:21,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079114855] [2021-05-06 09:08:21,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:08:21,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:08:21,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 09:08:21,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:08:21,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 09:08:21,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:08:21,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 09:08:21,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:08:21,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-06 09:08:21,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:08:21,282 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 09:08:21,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:08:21,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079114855] [2021-05-06 09:08:21,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079114855] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 09:08:21,283 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 09:08:21,283 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 09:08:21,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175638037] [2021-05-06 09:08:21,284 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 09:08:21,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:08:21,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 09:08:21,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 09:08:21,286 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 09:08:21,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:08:21,623 INFO L93 Difference]: Finished difference Result 44 states and 58 transitions. [2021-05-06 09:08:21,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 09:08:21,625 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 09:08:21,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:08:21,627 INFO L225 Difference]: With dead ends: 44 [2021-05-06 09:08:21,627 INFO L226 Difference]: Without dead ends: 44 [2021-05-06 09:08:21,628 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 166.1ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-06 09:08:21,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-06 09:08:21,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2021-05-06 09:08:21,643 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 09:08:21,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2021-05-06 09:08:21,650 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 28 [2021-05-06 09:08:21,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:08:21,651 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2021-05-06 09:08:21,652 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 09:08:21,652 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2021-05-06 09:08:21,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-06 09:08:21,653 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:08:21,653 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 09:08:21,653 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 09:08:21,653 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:08:21,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:08:21,654 INFO L82 PathProgramCache]: Analyzing trace with hash 1042498848, now seen corresponding path program 1 times [2021-05-06 09:08:21,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:08:21,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858485491] [2021-05-06 09:08:21,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:08:21,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:08:21,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 09:08:21,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:08:21,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 09:08:21,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:08:21,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 09:08:21,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:08:21,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-06 09:08:21,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:08:21,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-05-06 09:08:21,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:08:21,884 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 09:08:21,884 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:08:21,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858485491] [2021-05-06 09:08:21,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858485491] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 09:08:21,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 09:08:21,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 09:08:21,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745942615] [2021-05-06 09:08:21,886 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 09:08:21,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:08:21,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 09:08:21,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 09:08:21,887 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 09:08:22,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:08:22,256 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2021-05-06 09:08:22,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 09:08:22,257 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 09:08:22,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:08:22,258 INFO L225 Difference]: With dead ends: 48 [2021-05-06 09:08:22,258 INFO L226 Difference]: Without dead ends: 48 [2021-05-06 09:08:22,258 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 216.9ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-06 09:08:22,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-06 09:08:22,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2021-05-06 09:08:22,263 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 09:08:22,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2021-05-06 09:08:22,264 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 33 [2021-05-06 09:08:22,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:08:22,264 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2021-05-06 09:08:22,264 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 09:08:22,265 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2021-05-06 09:08:22,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-06 09:08:22,269 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:08:22,270 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 09:08:22,270 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-06 09:08:22,270 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:08:22,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:08:22,271 INFO L82 PathProgramCache]: Analyzing trace with hash 1436069466, now seen corresponding path program 1 times [2021-05-06 09:08:22,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:08:22,271 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109571427] [2021-05-06 09:08:22,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:08:22,295 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:08:22,296 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2085681120] [2021-05-06 09:08:22,296 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 09:08:22,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:08:22,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 09:08:22,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:08:22,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:08:22,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:08:22,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:08:22,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:08:22,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:08:22,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:08:22,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:08:22,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:08:22,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:08:22,730 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 09:08:22,731 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:08:22,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109571427] [2021-05-06 09:08:22,731 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:08:22,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085681120] [2021-05-06 09:08:22,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085681120] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:08:22,732 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:08:22,744 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 09:08:22,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434535] [2021-05-06 09:08:22,744 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 09:08:22,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:08:22,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 09:08:22,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 09:08:22,745 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 09:08:25,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:08:25,115 INFO L93 Difference]: Finished difference Result 62 states and 81 transitions. [2021-05-06 09:08:25,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 09:08:25,116 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 09:08:25,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:08:25,117 INFO L225 Difference]: With dead ends: 62 [2021-05-06 09:08:25,117 INFO L226 Difference]: Without dead ends: 61 [2021-05-06 09:08:25,118 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 51.2ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-06 09:08:25,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-05-06 09:08:25,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 55. [2021-05-06 09:08:25,123 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 09:08:25,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 69 transitions. [2021-05-06 09:08:25,124 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 69 transitions. Word has length 38 [2021-05-06 09:08:25,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:08:25,124 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 69 transitions. [2021-05-06 09:08:25,125 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 09:08:25,125 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 69 transitions. [2021-05-06 09:08:25,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-06 09:08:25,126 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:08:25,126 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 09:08:25,341 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:08:25,341 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:08:25,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:08:25,342 INFO L82 PathProgramCache]: Analyzing trace with hash 5711864, now seen corresponding path program 1 times [2021-05-06 09:08:25,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:08:25,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802974949] [2021-05-06 09:08:25,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:08:25,349 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:08:25,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1889484710] [2021-05-06 09:08:25,349 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 09:08:25,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:08:25,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 09:08:25,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:08:25,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:08:25,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:08:25,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:08:25,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:08:25,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:08:25,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:08:25,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:08:25,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:08:25,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:08:25,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:08:25,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:08:25,695 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 09:08:25,696 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:08:25,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802974949] [2021-05-06 09:08:25,696 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:08:25,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889484710] [2021-05-06 09:08:25,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889484710] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:08:25,697 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:08:25,697 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 09:08:25,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886802158] [2021-05-06 09:08:25,697 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 09:08:25,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:08:25,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 09:08:25,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 09:08:25,698 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 09:08:26,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:08:26,110 INFO L93 Difference]: Finished difference Result 74 states and 90 transitions. [2021-05-06 09:08:26,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 09:08:26,111 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 09:08:26,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:08:26,112 INFO L225 Difference]: With dead ends: 74 [2021-05-06 09:08:26,112 INFO L226 Difference]: Without dead ends: 73 [2021-05-06 09:08:26,113 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 135.7ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-06 09:08:26,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-05-06 09:08:26,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2021-05-06 09:08:26,118 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 09:08:26,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 87 transitions. [2021-05-06 09:08:26,119 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 87 transitions. Word has length 45 [2021-05-06 09:08:26,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:08:26,119 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 87 transitions. [2021-05-06 09:08:26,119 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 09:08:26,119 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 87 transitions. [2021-05-06 09:08:26,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-06 09:08:26,123 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:08:26,123 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 09:08:26,324 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:08:26,325 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:08:26,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:08:26,325 INFO L82 PathProgramCache]: Analyzing trace with hash 1597443315, now seen corresponding path program 1 times [2021-05-06 09:08:26,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:08:26,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444373163] [2021-05-06 09:08:26,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:08:26,333 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:08:26,334 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1156314488] [2021-05-06 09:08:26,334 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 09:08:26,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:08:26,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-06 09:08:26,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:08:26,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:08:26,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:08:26,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:08:26,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:08:26,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:08:26,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:08:26,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:08:26,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:08:26,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:08:26,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:08:26,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:08:26,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:08:26,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:08:26,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:08:26,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:08:26,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:08:26,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:08:26,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:08:26,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:08:26,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:08:26,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:08:26,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:08:26,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:08:26,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:08:26,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:08:27,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:08:27,023 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 15 proven. 11 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-06 09:08:27,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:08:27,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444373163] [2021-05-06 09:08:27,024 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:08:27,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156314488] [2021-05-06 09:08:27,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156314488] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:08:27,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:08:27,024 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 09:08:27,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425413210] [2021-05-06 09:08:27,024 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 09:08:27,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:08:27,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 09:08:27,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-05-06 09:08:27,025 INFO L87 Difference]: Start difference. First operand 72 states and 87 transitions. Second operand has 13 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 10 states have internal predecessors, (20), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2021-05-06 09:08:32,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:08:32,211 INFO L93 Difference]: Finished difference Result 91 states and 115 transitions. [2021-05-06 09:08:32,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 09:08:32,211 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 10 states have internal predecessors, (20), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) Word has length 55 [2021-05-06 09:08:32,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:08:32,214 INFO L225 Difference]: With dead ends: 91 [2021-05-06 09:08:32,214 INFO L226 Difference]: Without dead ends: 91 [2021-05-06 09:08:32,214 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 297.2ms TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-05-06 09:08:32,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-05-06 09:08:32,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 85. [2021-05-06 09:08:32,221 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 09:08:32,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 105 transitions. [2021-05-06 09:08:32,222 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 105 transitions. Word has length 55 [2021-05-06 09:08:32,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:08:32,223 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 105 transitions. [2021-05-06 09:08:32,223 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 10 states have internal predecessors, (20), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2021-05-06 09:08:32,223 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 105 transitions. [2021-05-06 09:08:32,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-05-06 09:08:32,224 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:08:32,224 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 09:08:32,429 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:08:32,430 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:08:32,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:08:32,430 INFO L82 PathProgramCache]: Analyzing trace with hash -1535015126, now seen corresponding path program 1 times [2021-05-06 09:08:32,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:08:32,430 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531751197] [2021-05-06 09:08:32,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:08:32,438 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:08:32,439 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1673327668] [2021-05-06 09:08:32,439 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