/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/hard2_valuebound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 09:19:16,781 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 09:19:16,783 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 09:19:16,807 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 09:19:16,807 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 09:19:16,811 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 09:19:16,813 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 09:19:16,820 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 09:19:16,822 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 09:19:16,825 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 09:19:16,826 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 09:19:16,827 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 09:19:16,827 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 09:19:16,829 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 09:19:16,830 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 09:19:16,831 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 09:19:16,833 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 09:19:16,833 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 09:19:16,835 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 09:19:16,840 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 09:19:16,841 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 09:19:16,842 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 09:19:16,843 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 09:19:16,845 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 09:19:16,849 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 09:19:16,856 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 09:19:16,856 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 09:19:16,857 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 09:19:16,857 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 09:19:16,871 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 09:19:16,872 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 09:19:16,874 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 09:19:16,874 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 09:19:16,874 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 09:19:16,874 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 09:19:16,875 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 09:19:16,875 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 09:19:16,875 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 09:19:16,875 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 09:19:16,875 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 09:19:16,876 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 09:19:16,876 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 09:19:16,876 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 09:19:16,876 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 09:19:16,876 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 09:19:16,877 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 09:19:16,877 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 09:19:16,877 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 09:19:16,877 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 09:19:16,877 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 09:19:16,878 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 09:19:16,878 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 09:19:17,130 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 09:19:17,146 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 09:19:17,148 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 09:19:17,149 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 09:19:17,149 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 09:19:17,150 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard2_valuebound5.c [2021-05-06 09:19:17,203 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3c3533ffe/2cb9422e47894c72a508d06101146750/FLAG066041059 [2021-05-06 09:19:17,578 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 09:19:17,578 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard2_valuebound5.c [2021-05-06 09:19:17,594 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3c3533ffe/2cb9422e47894c72a508d06101146750/FLAG066041059 [2021-05-06 09:19:17,609 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3c3533ffe/2cb9422e47894c72a508d06101146750 [2021-05-06 09:19:17,611 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 09:19:17,613 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 09:19:17,617 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 09:19:17,618 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 09:19:17,621 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 09:19:17,621 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 09:19:17" (1/1) ... [2021-05-06 09:19:17,622 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7dead921 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:19:17, skipping insertion in model container [2021-05-06 09:19:17,622 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 09:19:17" (1/1) ... [2021-05-06 09:19:17,628 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 09:19:17,644 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 09:19:17,774 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/hard2_valuebound5.c[526,539] [2021-05-06 09:19:17,789 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 09:19:17,795 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 09:19:17,805 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/hard2_valuebound5.c[526,539] [2021-05-06 09:19:17,819 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 09:19:17,837 INFO L208 MainTranslator]: Completed translation [2021-05-06 09:19:17,837 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:19:17 WrapperNode [2021-05-06 09:19:17,838 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 09:19:17,839 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 09:19:17,839 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 09:19:17,839 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 09:19:17,879 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:19:17" (1/1) ... [2021-05-06 09:19:17,879 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:19:17" (1/1) ... [2021-05-06 09:19:17,885 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:19:17" (1/1) ... [2021-05-06 09:19:17,886 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:19:17" (1/1) ... [2021-05-06 09:19:17,896 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:19:17" (1/1) ... [2021-05-06 09:19:17,900 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:19:17" (1/1) ... [2021-05-06 09:19:17,904 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:19:17" (1/1) ... [2021-05-06 09:19:17,907 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 09:19:17,908 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 09:19:17,908 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 09:19:17,908 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 09:19:17,909 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:19:17" (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 09:19:17,985 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 09:19:17,985 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 09:19:17,985 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 09:19:17,985 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 09:19:17,985 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 09:19:17,985 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 09:19:17,985 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 09:19:17,986 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 09:19:17,986 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 09:19:17,986 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 09:19:17,986 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 09:19:17,986 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 09:19:17,987 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 09:19:17,987 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 09:19:17,987 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 09:19:17,987 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 09:19:17,987 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 09:19:17,987 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 09:19:17,988 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 09:19:17,988 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 09:19:18,226 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 09:19:18,227 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-06 09:19:18,228 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 09:19:18 BoogieIcfgContainer [2021-05-06 09:19:18,228 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 09:19:18,228 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 09:19:18,228 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 09:19:18,229 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 09:19:18,231 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 09:19:18" (1/1) ... [2021-05-06 09:19:18,256 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 09:19:18 BasicIcfg [2021-05-06 09:19:18,257 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 09:19:18,258 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 09:19:18,258 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 09:19:18,260 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 09:19:18,260 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 09:19:17" (1/4) ... [2021-05-06 09:19:18,261 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cede2fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 09:19:18, skipping insertion in model container [2021-05-06 09:19:18,261 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 09:19:17" (2/4) ... [2021-05-06 09:19:18,261 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cede2fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 09:19:18, skipping insertion in model container [2021-05-06 09:19:18,261 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 09:19:18" (3/4) ... [2021-05-06 09:19:18,261 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cede2fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 09:19:18, skipping insertion in model container [2021-05-06 09:19:18,261 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 09:19:18" (4/4) ... [2021-05-06 09:19:18,262 INFO L111 eAbstractionObserver]: Analyzing ICFG hard2_valuebound5.cJordan [2021-05-06 09:19:18,282 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 09:19:18,285 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 09:19:18,301 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 09:19:18,323 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 09:19:18,323 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 09:19:18,323 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 09:19:18,323 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 09:19:18,323 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 09:19:18,324 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 09:19:18,324 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 09:19:18,324 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 09:19:18,339 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 09:19:18,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-06 09:19:18,345 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:19:18,346 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:19:18,346 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:19:18,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:19:18,351 INFO L82 PathProgramCache]: Analyzing trace with hash -1625753047, now seen corresponding path program 1 times [2021-05-06 09:19:18,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:19:18,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621939582] [2021-05-06 09:19:18,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:19:18,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:19:18,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 09:19:18,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:19:18,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 09:19:18,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:19:18,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 09:19:18,598 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:19:18,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621939582] [2021-05-06 09:19:18,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621939582] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 09:19:18,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 09:19:18,600 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 09:19:18,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635563030] [2021-05-06 09:19:18,605 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 09:19:18,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:19:18,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 09:19:18,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 09:19:18,617 INFO L87 Difference]: Start difference. First operand has 35 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 09:19:18,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:19:18,709 INFO L93 Difference]: Finished difference Result 35 states and 43 transitions. [2021-05-06 09:19:18,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 09:19:18,711 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-06 09:19:18,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:19:18,716 INFO L225 Difference]: With dead ends: 35 [2021-05-06 09:19:18,716 INFO L226 Difference]: Without dead ends: 30 [2021-05-06 09:19:18,717 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 46.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 09:19:18,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-05-06 09:19:18,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-05-06 09:19:18,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 09:19:18,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2021-05-06 09:19:18,746 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 17 [2021-05-06 09:19:18,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:19:18,746 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2021-05-06 09:19:18,746 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 09:19:18,746 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2021-05-06 09:19:18,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-06 09:19:18,748 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:19:18,748 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:19:18,748 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 09:19:18,748 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:19:18,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:19:18,749 INFO L82 PathProgramCache]: Analyzing trace with hash 861759786, now seen corresponding path program 1 times [2021-05-06 09:19:18,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:19:18,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909558733] [2021-05-06 09:19:18,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:19:18,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:19:18,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 09:19:18,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:19:18,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 09:19:18,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:19:18,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 09:19:18,856 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:19:18,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909558733] [2021-05-06 09:19:18,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909558733] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 09:19:18,856 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 09:19:18,856 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 09:19:18,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441686783] [2021-05-06 09:19:18,857 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 09:19:18,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:19:18,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 09:19:18,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 09:19:18,858 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 09:19:19,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:19:19,077 INFO L93 Difference]: Finished difference Result 41 states and 53 transitions. [2021-05-06 09:19:19,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 09:19:19,078 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-06 09:19:19,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:19:19,079 INFO L225 Difference]: With dead ends: 41 [2021-05-06 09:19:19,079 INFO L226 Difference]: Without dead ends: 41 [2021-05-06 09:19:19,080 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 126.1ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-06 09:19:19,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-05-06 09:19:19,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 34. [2021-05-06 09:19:19,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 09:19:19,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2021-05-06 09:19:19,085 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 17 [2021-05-06 09:19:19,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:19:19,086 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2021-05-06 09:19:19,086 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 09:19:19,086 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2021-05-06 09:19:19,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-06 09:19:19,086 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:19:19,086 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:19:19,086 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 09:19:19,087 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:19:19,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:19:19,087 INFO L82 PathProgramCache]: Analyzing trace with hash 325569287, now seen corresponding path program 1 times [2021-05-06 09:19:19,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:19:19,087 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762499626] [2021-05-06 09:19:19,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:19:19,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:19:19,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 09:19:19,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:19:19,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 09:19:19,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:19:19,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-05-06 09:19:19,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:19:19,148 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 09:19:19,149 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:19:19,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762499626] [2021-05-06 09:19:19,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762499626] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 09:19:19,149 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 09:19:19,149 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 09:19:19,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879950172] [2021-05-06 09:19:19,149 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 09:19:19,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:19:19,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 09:19:19,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 09:19:19,150 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 09:19:19,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:19:19,364 INFO L93 Difference]: Finished difference Result 45 states and 56 transitions. [2021-05-06 09:19:19,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 09:19:19,364 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2021-05-06 09:19:19,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:19:19,367 INFO L225 Difference]: With dead ends: 45 [2021-05-06 09:19:19,367 INFO L226 Difference]: Without dead ends: 45 [2021-05-06 09:19:19,368 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 104.7ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-06 09:19:19,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-06 09:19:19,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 38. [2021-05-06 09:19:19,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-06 09:19:19,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2021-05-06 09:19:19,379 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 22 [2021-05-06 09:19:19,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:19:19,379 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2021-05-06 09:19:19,380 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 09:19:19,380 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2021-05-06 09:19:19,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-06 09:19:19,381 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:19:19,381 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:19:19,381 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-06 09:19:19,382 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:19:19,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:19:19,382 INFO L82 PathProgramCache]: Analyzing trace with hash -1461652409, now seen corresponding path program 1 times [2021-05-06 09:19:19,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:19:19,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711717579] [2021-05-06 09:19:19,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:19:19,398 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:19:19,398 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [460869729] [2021-05-06 09:19:19,398 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 09:19:19,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:19:19,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 09:19:19,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:19:19,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:19,688 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 09:19:19,689 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:19:19,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711717579] [2021-05-06 09:19:19,689 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:19:19,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460869729] [2021-05-06 09:19:19,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460869729] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 09:19:19,689 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 09:19:19,689 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 09:19:19,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574068591] [2021-05-06 09:19:19,690 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 09:19:19,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:19:19,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 09:19:19,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 09:19:19,691 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 09:19:19,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:19:19,737 INFO L93 Difference]: Finished difference Result 53 states and 65 transitions. [2021-05-06 09:19:19,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 09:19:19,739 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 27 [2021-05-06 09:19:19,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:19:19,740 INFO L225 Difference]: With dead ends: 53 [2021-05-06 09:19:19,740 INFO L226 Difference]: Without dead ends: 52 [2021-05-06 09:19:19,740 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.7ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 09:19:19,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-05-06 09:19:19,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-05-06 09:19:19,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 31 states have internal predecessors, (34), 16 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 09:19:19,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 63 transitions. [2021-05-06 09:19:19,744 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 63 transitions. Word has length 27 [2021-05-06 09:19:19,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:19:19,745 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 63 transitions. [2021-05-06 09:19:19,745 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 09:19:19,745 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 63 transitions. [2021-05-06 09:19:19,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-06 09:19:19,746 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:19:19,746 INFO L523 BasicCegarLoop]: trace histogram [4, 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] [2021-05-06 09:19:19,965 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:19:19,965 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:19:19,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:19:19,966 INFO L82 PathProgramCache]: Analyzing trace with hash 1008917278, now seen corresponding path program 1 times [2021-05-06 09:19:19,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:19:19,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683586621] [2021-05-06 09:19:19,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:19:19,974 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:19:19,975 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1594515799] [2021-05-06 09:19:19,975 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 09:19:20,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:19:20,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 09:19:20,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:19:20,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:20,191 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 09:19:20,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:19:20,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683586621] [2021-05-06 09:19:20,192 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:19:20,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594515799] [2021-05-06 09:19:20,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594515799] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 09:19:20,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 09:19:20,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 09:19:20,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997517564] [2021-05-06 09:19:20,193 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 09:19:20,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:19:20,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 09:19:20,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 09:19:20,193 INFO L87 Difference]: Start difference. First operand 52 states and 63 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 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 09:19:20,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:19:20,243 INFO L93 Difference]: Finished difference Result 63 states and 78 transitions. [2021-05-06 09:19:20,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 09:19:20,244 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 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 34 [2021-05-06 09:19:20,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:19:20,246 INFO L225 Difference]: With dead ends: 63 [2021-05-06 09:19:20,246 INFO L226 Difference]: Without dead ends: 58 [2021-05-06 09:19:20,246 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.8ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 09:19:20,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-05-06 09:19:20,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2021-05-06 09:19:20,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 35 states have internal predecessors, (39), 16 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-06 09:19:20,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 69 transitions. [2021-05-06 09:19:20,260 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 69 transitions. Word has length 34 [2021-05-06 09:19:20,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:19:20,261 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 69 transitions. [2021-05-06 09:19:20,261 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 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 09:19:20,261 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 69 transitions. [2021-05-06 09:19:20,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-06 09:19:20,262 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:19:20,263 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:19:20,469 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:19:20,469 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:19:20,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:19:20,469 INFO L82 PathProgramCache]: Analyzing trace with hash -1762200840, now seen corresponding path program 1 times [2021-05-06 09:19:20,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:19:20,470 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035616806] [2021-05-06 09:19:20,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:19:20,478 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:19:20,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2026220609] [2021-05-06 09:19:20,478 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 09:19:20,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:19:20,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 09:19:20,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:19:20,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:20,711 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-06 09:19:20,711 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:19:20,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035616806] [2021-05-06 09:19:20,712 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:19:20,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026220609] [2021-05-06 09:19:20,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026220609] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:19:20,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:19:20,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 09:19:20,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976176088] [2021-05-06 09:19:20,712 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 09:19:20,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:19:20,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 09:19:20,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 09:19:20,713 INFO L87 Difference]: Start difference. First operand 57 states and 69 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 09:19:20,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:19:20,797 INFO L93 Difference]: Finished difference Result 82 states and 106 transitions. [2021-05-06 09:19:20,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 09:19:20,798 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 44 [2021-05-06 09:19:20,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:19:20,803 INFO L225 Difference]: With dead ends: 82 [2021-05-06 09:19:20,803 INFO L226 Difference]: Without dead ends: 76 [2021-05-06 09:19:20,804 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.5ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 09:19:20,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-05-06 09:19:20,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2021-05-06 09:19:20,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 43 states have (on average 1.1627906976744187) internal successors, (50), 46 states have internal predecessors, (50), 24 states have call successors, (24), 9 states have call predecessors, (24), 8 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 09:19:20,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 95 transitions. [2021-05-06 09:19:20,812 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 95 transitions. Word has length 44 [2021-05-06 09:19:20,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:19:20,812 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 95 transitions. [2021-05-06 09:19:20,812 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 09:19:20,812 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 95 transitions. [2021-05-06 09:19:20,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-06 09:19:20,813 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:19:20,813 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:19:21,020 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:19:21,021 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:19:21,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:19:21,022 INFO L82 PathProgramCache]: Analyzing trace with hash -1665528729, now seen corresponding path program 2 times [2021-05-06 09:19:21,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:19:21,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489998378] [2021-05-06 09:19:21,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:19:21,034 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:19:21,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [779722233] [2021-05-06 09:19:21,034 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:19:21,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 09:19:21,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 09:19:21,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-06 09:19:21,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:19:21,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:21,255 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 16 proven. 13 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-05-06 09:19:21,255 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:19:21,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489998378] [2021-05-06 09:19:21,255 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:19:21,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779722233] [2021-05-06 09:19:21,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779722233] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:19:21,256 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:19:21,256 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 09:19:21,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888843848] [2021-05-06 09:19:21,257 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 09:19:21,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:19:21,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 09:19:21,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 09:19:21,257 INFO L87 Difference]: Start difference. First operand 76 states and 95 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-06 09:19:21,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:19:21,373 INFO L93 Difference]: Finished difference Result 111 states and 148 transitions. [2021-05-06 09:19:21,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 09:19:21,375 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 61 [2021-05-06 09:19:21,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:19:21,377 INFO L225 Difference]: With dead ends: 111 [2021-05-06 09:19:21,377 INFO L226 Difference]: Without dead ends: 105 [2021-05-06 09:19:21,379 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 40.5ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 09:19:21,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-05-06 09:19:21,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 103. [2021-05-06 09:19:21,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 58 states have (on average 1.1724137931034482) internal successors, (68), 62 states have internal predecessors, (68), 35 states have call successors, (35), 10 states have call predecessors, (35), 9 states have return successors, (32), 30 states have call predecessors, (32), 32 states have call successors, (32) [2021-05-06 09:19:21,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 135 transitions. [2021-05-06 09:19:21,406 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 135 transitions. Word has length 61 [2021-05-06 09:19:21,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:19:21,407 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 135 transitions. [2021-05-06 09:19:21,407 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-06 09:19:21,407 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 135 transitions. [2021-05-06 09:19:21,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-05-06 09:19:21,407 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:19:21,408 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:19:21,608 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:19:21,608 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:19:21,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:19:21,609 INFO L82 PathProgramCache]: Analyzing trace with hash -1382136022, now seen corresponding path program 1 times [2021-05-06 09:19:21,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:19:21,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159911084] [2021-05-06 09:19:21,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:19:21,616 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:19:21,616 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1287834951] [2021-05-06 09:19:21,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:19:21,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:19:21,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-06 09:19:21,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:19:21,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:21,824 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-05-06 09:19:21,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:19:21,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159911084] [2021-05-06 09:19:21,824 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:19:21,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287834951] [2021-05-06 09:19:21,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287834951] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:19:21,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:19:21,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 09:19:21,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913768526] [2021-05-06 09:19:21,825 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 09:19:21,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:19:21,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 09:19:21,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 09:19:21,829 INFO L87 Difference]: Start difference. First operand 103 states and 135 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-05-06 09:19:21,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:19:21,943 INFO L93 Difference]: Finished difference Result 125 states and 152 transitions. [2021-05-06 09:19:21,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 09:19:21,945 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 64 [2021-05-06 09:19:21,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:19:21,948 INFO L225 Difference]: With dead ends: 125 [2021-05-06 09:19:21,948 INFO L226 Difference]: Without dead ends: 125 [2021-05-06 09:19:21,949 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.9ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 09:19:21,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-05-06 09:19:21,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 123. [2021-05-06 09:19:21,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 73 states have (on average 1.1369863013698631) internal successors, (83), 77 states have internal predecessors, (83), 35 states have call successors, (35), 15 states have call predecessors, (35), 14 states have return successors, (32), 30 states have call predecessors, (32), 32 states have call successors, (32) [2021-05-06 09:19:21,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 150 transitions. [2021-05-06 09:19:21,954 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 150 transitions. Word has length 64 [2021-05-06 09:19:21,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:19:21,954 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 150 transitions. [2021-05-06 09:19:21,954 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-05-06 09:19:21,954 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 150 transitions. [2021-05-06 09:19:21,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-06 09:19:21,955 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:19:21,955 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:19:22,161 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:19:22,161 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:19:22,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:19:22,161 INFO L82 PathProgramCache]: Analyzing trace with hash -1085940318, now seen corresponding path program 1 times [2021-05-06 09:19:22,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:19:22,162 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881371868] [2021-05-06 09:19:22,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:19:22,191 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:19:22,192 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [486937392] [2021-05-06 09:19:22,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:19:22,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:19:22,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-06 09:19:22,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:19:22,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:22,440 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 20 proven. 9 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-05-06 09:19:22,440 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:19:22,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881371868] [2021-05-06 09:19:22,440 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:19:22,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486937392] [2021-05-06 09:19:22,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486937392] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:19:22,441 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:19:22,441 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 09:19:22,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383254271] [2021-05-06 09:19:22,441 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 09:19:22,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:19:22,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 09:19:22,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 09:19:22,442 INFO L87 Difference]: Start difference. First operand 123 states and 150 transitions. Second operand has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 5 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-06 09:19:22,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:19:22,521 INFO L93 Difference]: Finished difference Result 129 states and 155 transitions. [2021-05-06 09:19:22,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 09:19:22,522 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 5 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 75 [2021-05-06 09:19:22,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:19:22,523 INFO L225 Difference]: With dead ends: 129 [2021-05-06 09:19:22,523 INFO L226 Difference]: Without dead ends: 103 [2021-05-06 09:19:22,523 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 38.9ms TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-06 09:19:22,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-05-06 09:19:22,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2021-05-06 09:19:22,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 60 states have (on average 1.15) internal successors, (69), 63 states have internal predecessors, (69), 31 states have call successors, (31), 12 states have call predecessors, (31), 11 states have return successors, (28), 27 states have call predecessors, (28), 28 states have call successors, (28) [2021-05-06 09:19:22,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 128 transitions. [2021-05-06 09:19:22,527 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 128 transitions. Word has length 75 [2021-05-06 09:19:22,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:19:22,527 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 128 transitions. [2021-05-06 09:19:22,527 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 5 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-06 09:19:22,527 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 128 transitions. [2021-05-06 09:19:22,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-05-06 09:19:22,528 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:19:22,528 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:19:22,744 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:19:22,744 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:19:22,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:19:22,744 INFO L82 PathProgramCache]: Analyzing trace with hash -273867048, now seen corresponding path program 3 times [2021-05-06 09:19:22,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:19:22,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028074697] [2021-05-06 09:19:22,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:19:22,751 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:19:22,751 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [174912060] [2021-05-06 09:19:22,751 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:19:22,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 09:19:22,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 09:19:22,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-06 09:19:22,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:19:22,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:22,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:22,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:22,977 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 59 proven. 7 refuted. 0 times theorem prover too weak. 203 trivial. 0 not checked. [2021-05-06 09:19:22,977 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:19:22,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028074697] [2021-05-06 09:19:22,977 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:19:22,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174912060] [2021-05-06 09:19:22,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174912060] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:19:22,978 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:19:22,978 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 09:19:22,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577046483] [2021-05-06 09:19:22,979 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 09:19:22,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:19:22,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 09:19:22,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-06 09:19:22,980 INFO L87 Difference]: Start difference. First operand 103 states and 128 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 09:19:23,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:19:23,089 INFO L93 Difference]: Finished difference Result 111 states and 137 transitions. [2021-05-06 09:19:23,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 09:19:23,089 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), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 78 [2021-05-06 09:19:23,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:19:23,090 INFO L225 Difference]: With dead ends: 111 [2021-05-06 09:19:23,090 INFO L226 Difference]: Without dead ends: 111 [2021-05-06 09:19:23,090 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 43.9ms TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-05-06 09:19:23,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-05-06 09:19:23,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2021-05-06 09:19:23,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 65 states have (on average 1.1384615384615384) internal successors, (74), 68 states have internal predecessors, (74), 33 states have call successors, (33), 13 states have call predecessors, (33), 12 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) [2021-05-06 09:19:23,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 137 transitions. [2021-05-06 09:19:23,094 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 137 transitions. Word has length 78 [2021-05-06 09:19:23,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:19:23,094 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 137 transitions. [2021-05-06 09:19:23,095 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), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 09:19:23,095 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 137 transitions. [2021-05-06 09:19:23,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-05-06 09:19:23,095 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:19:23,095 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:19:23,313 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-06 09:19:23,313 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:19:23,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:19:23,314 INFO L82 PathProgramCache]: Analyzing trace with hash -1708305639, now seen corresponding path program 2 times [2021-05-06 09:19:23,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:19:23,314 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128836365] [2021-05-06 09:19:23,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:19:23,320 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:19:23,320 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [541900909] [2021-05-06 09:19:23,320 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:19:23,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 09:19:23,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 09:19:23,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-06 09:19:23,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:19:23,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:23,556 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 22 proven. 17 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2021-05-06 09:19:23,557 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:19:23,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128836365] [2021-05-06 09:19:23,557 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:19:23,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541900909] [2021-05-06 09:19:23,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541900909] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:19:23,557 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:19:23,557 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 09:19:23,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78545611] [2021-05-06 09:19:23,557 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 09:19:23,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:19:23,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 09:19:23,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 09:19:23,558 INFO L87 Difference]: Start difference. First operand 111 states and 137 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 5 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 09:19:23,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:19:23,686 INFO L93 Difference]: Finished difference Result 136 states and 159 transitions. [2021-05-06 09:19:23,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 09:19:23,686 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 5 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 81 [2021-05-06 09:19:23,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:19:23,687 INFO L225 Difference]: With dead ends: 136 [2021-05-06 09:19:23,687 INFO L226 Difference]: Without dead ends: 136 [2021-05-06 09:19:23,687 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 49.6ms TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 09:19:23,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-05-06 09:19:23,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 133. [2021-05-06 09:19:23,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 81 states have (on average 1.1111111111111112) internal successors, (90), 85 states have internal predecessors, (90), 34 states have call successors, (34), 18 states have call predecessors, (34), 17 states have return successors, (31), 29 states have call predecessors, (31), 31 states have call successors, (31) [2021-05-06 09:19:23,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 155 transitions. [2021-05-06 09:19:23,692 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 155 transitions. Word has length 81 [2021-05-06 09:19:23,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:19:23,692 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 155 transitions. [2021-05-06 09:19:23,692 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 5 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 09:19:23,692 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 155 transitions. [2021-05-06 09:19:23,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-05-06 09:19:23,693 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:19:23,693 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:19:23,908 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-05-06 09:19:23,909 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:19:23,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:19:23,909 INFO L82 PathProgramCache]: Analyzing trace with hash -233495842, now seen corresponding path program 3 times [2021-05-06 09:19:23,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:19:23,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380965576] [2021-05-06 09:19:23,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:19:23,915 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:19:23,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1313786757] [2021-05-06 09:19:23,916 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:19:23,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 09:19:23,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 09:19:23,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-06 09:19:23,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:19:24,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:24,220 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 26 proven. 24 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2021-05-06 09:19:24,221 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:19:24,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380965576] [2021-05-06 09:19:24,221 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:19:24,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313786757] [2021-05-06 09:19:24,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313786757] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:19:24,221 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:19:24,221 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 09:19:24,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913032552] [2021-05-06 09:19:24,221 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 09:19:24,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:19:24,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 09:19:24,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-05-06 09:19:24,222 INFO L87 Difference]: Start difference. First operand 133 states and 155 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 6 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 09:19:24,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:19:24,402 INFO L93 Difference]: Finished difference Result 149 states and 172 transitions. [2021-05-06 09:19:24,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 09:19:24,402 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 6 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 94 [2021-05-06 09:19:24,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:19:24,403 INFO L225 Difference]: With dead ends: 149 [2021-05-06 09:19:24,403 INFO L226 Difference]: Without dead ends: 144 [2021-05-06 09:19:24,404 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 76.0ms TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-05-06 09:19:24,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-05-06 09:19:24,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 141. [2021-05-06 09:19:24,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 87 states have (on average 1.0919540229885059) internal successors, (95), 91 states have internal predecessors, (95), 34 states have call successors, (34), 20 states have call predecessors, (34), 19 states have return successors, (31), 29 states have call predecessors, (31), 31 states have call successors, (31) [2021-05-06 09:19:24,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 160 transitions. [2021-05-06 09:19:24,408 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 160 transitions. Word has length 94 [2021-05-06 09:19:24,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:19:24,408 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 160 transitions. [2021-05-06 09:19:24,408 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 6 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 09:19:24,408 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 160 transitions. [2021-05-06 09:19:24,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-05-06 09:19:24,409 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:19:24,409 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:19:24,628 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:19:24,629 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:19:24,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:19:24,629 INFO L82 PathProgramCache]: Analyzing trace with hash -1077967713, now seen corresponding path program 1 times [2021-05-06 09:19:24,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:19:24,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933570681] [2021-05-06 09:19:24,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:19:24,636 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:19:24,636 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1656742577] [2021-05-06 09:19:24,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:19:24,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:19:24,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-06 09:19:24,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:19:24,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:24,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:24,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:24,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:24,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:24,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:24,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:24,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:24,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:24,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:24,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:24,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:24,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:24,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:24,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:24,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:24,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:24,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:24,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:24,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:24,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:24,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:24,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:24,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:24,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:24,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:24,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:24,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:24,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:24,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:24,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:24,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:24,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:24,984 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 132 proven. 0 refuted. 0 times theorem prover too weak. 230 trivial. 0 not checked. [2021-05-06 09:19:24,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:19:24,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933570681] [2021-05-06 09:19:24,985 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:19:24,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656742577] [2021-05-06 09:19:24,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656742577] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 09:19:24,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 09:19:24,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 09:19:24,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623473377] [2021-05-06 09:19:24,985 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 09:19:24,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:19:24,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 09:19:24,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 09:19:24,986 INFO L87 Difference]: Start difference. First operand 141 states and 160 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 09:19:25,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:19:25,057 INFO L93 Difference]: Finished difference Result 142 states and 161 transitions. [2021-05-06 09:19:25,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 09:19:25,058 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 94 [2021-05-06 09:19:25,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:19:25,059 INFO L225 Difference]: With dead ends: 142 [2021-05-06 09:19:25,059 INFO L226 Difference]: Without dead ends: 142 [2021-05-06 09:19:25,059 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 43.7ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-06 09:19:25,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-05-06 09:19:25,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 129. [2021-05-06 09:19:25,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 81 states have (on average 1.0617283950617284) internal successors, (86), 83 states have internal predecessors, (86), 28 states have call successors, (28), 20 states have call predecessors, (28), 19 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2021-05-06 09:19:25,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 139 transitions. [2021-05-06 09:19:25,063 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 139 transitions. Word has length 94 [2021-05-06 09:19:25,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:19:25,063 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 139 transitions. [2021-05-06 09:19:25,063 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 09:19:25,063 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 139 transitions. [2021-05-06 09:19:25,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-05-06 09:19:25,064 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:19:25,064 INFO L523 BasicCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:19:25,274 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:19:25,275 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:19:25,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:19:25,275 INFO L82 PathProgramCache]: Analyzing trace with hash 1181205258, now seen corresponding path program 4 times [2021-05-06 09:19:25,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:19:25,275 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223860428] [2021-05-06 09:19:25,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:19:25,281 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:19:25,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [919358952] [2021-05-06 09:19:25,281 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:19:25,336 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 09:19:25,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 09:19:25,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-06 09:19:25,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:19:25,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:25,542 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 28 proven. 32 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2021-05-06 09:19:25,542 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:19:25,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223860428] [2021-05-06 09:19:25,542 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:19:25,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919358952] [2021-05-06 09:19:25,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919358952] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:19:25,542 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:19:25,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 09:19:25,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577264739] [2021-05-06 09:19:25,543 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 09:19:25,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:19:25,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 09:19:25,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-05-06 09:19:25,544 INFO L87 Difference]: Start difference. First operand 129 states and 139 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2021-05-06 09:19:25,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:19:25,719 INFO L93 Difference]: Finished difference Result 166 states and 182 transitions. [2021-05-06 09:19:25,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 09:19:25,720 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) Word has length 98 [2021-05-06 09:19:25,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:19:25,721 INFO L225 Difference]: With dead ends: 166 [2021-05-06 09:19:25,721 INFO L226 Difference]: Without dead ends: 166 [2021-05-06 09:19:25,721 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 59.2ms TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-06 09:19:25,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-05-06 09:19:25,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 164. [2021-05-06 09:19:25,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 104 states have (on average 1.0769230769230769) internal successors, (112), 106 states have internal predecessors, (112), 35 states have call successors, (35), 25 states have call predecessors, (35), 24 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2021-05-06 09:19:25,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 179 transitions. [2021-05-06 09:19:25,726 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 179 transitions. Word has length 98 [2021-05-06 09:19:25,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:19:25,726 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 179 transitions. [2021-05-06 09:19:25,726 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2021-05-06 09:19:25,727 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 179 transitions. [2021-05-06 09:19:25,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-05-06 09:19:25,727 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:19:25,727 INFO L523 BasicCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:19:25,941 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-06 09:19:25,941 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:19:25,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:19:25,941 INFO L82 PathProgramCache]: Analyzing trace with hash -1771017874, now seen corresponding path program 2 times [2021-05-06 09:19:25,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:19:25,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226345273] [2021-05-06 09:19:25,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:19:25,947 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:19:25,947 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1772360575] [2021-05-06 09:19:25,948 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:19:26,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 09:19:26,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 09:19:26,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-06 09:19:26,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:19:26,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:26,219 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 30 proven. 28 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2021-05-06 09:19:26,219 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:19:26,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226345273] [2021-05-06 09:19:26,219 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:19:26,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772360575] [2021-05-06 09:19:26,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772360575] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:19:26,219 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:19:26,219 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 09:19:26,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861325620] [2021-05-06 09:19:26,220 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 09:19:26,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:19:26,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 09:19:26,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-05-06 09:19:26,220 INFO L87 Difference]: Start difference. First operand 164 states and 179 transitions. Second operand has 11 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 7 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2021-05-06 09:19:26,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:19:26,350 INFO L93 Difference]: Finished difference Result 168 states and 182 transitions. [2021-05-06 09:19:26,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 09:19:26,351 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 7 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) Word has length 105 [2021-05-06 09:19:26,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:19:26,351 INFO L225 Difference]: With dead ends: 168 [2021-05-06 09:19:26,351 INFO L226 Difference]: Without dead ends: 129 [2021-05-06 09:19:26,352 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 77.9ms TimeCoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-05-06 09:19:26,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-05-06 09:19:26,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2021-05-06 09:19:26,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 81 states have (on average 1.0864197530864197) internal successors, (88), 82 states have internal predecessors, (88), 28 states have call successors, (28), 20 states have call predecessors, (28), 19 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2021-05-06 09:19:26,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 142 transitions. [2021-05-06 09:19:26,355 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 142 transitions. Word has length 105 [2021-05-06 09:19:26,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:19:26,355 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 142 transitions. [2021-05-06 09:19:26,355 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 7 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2021-05-06 09:19:26,355 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 142 transitions. [2021-05-06 09:19:26,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-05-06 09:19:26,356 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:19:26,356 INFO L523 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:19:26,573 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-06 09:19:26,573 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:19:26,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:19:26,573 INFO L82 PathProgramCache]: Analyzing trace with hash 348272066, now seen corresponding path program 3 times [2021-05-06 09:19:26,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:19:26,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226457388] [2021-05-06 09:19:26,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:19:26,579 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:19:26,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1401169084] [2021-05-06 09:19:26,579 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:19:26,661 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 09:19:26,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 09:19:26,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-06 09:19:26,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:19:26,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:26,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:26,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:26,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:26,808 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 57 proven. 4 refuted. 0 times theorem prover too weak. 485 trivial. 0 not checked. [2021-05-06 09:19:26,808 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:19:26,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226457388] [2021-05-06 09:19:26,808 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:19:26,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401169084] [2021-05-06 09:19:26,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401169084] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:19:26,808 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:19:26,808 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2021-05-06 09:19:26,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135679976] [2021-05-06 09:19:26,809 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 09:19:26,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:19:26,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 09:19:26,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-06 09:19:26,809 INFO L87 Difference]: Start difference. First operand 129 states and 142 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 4 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-05-06 09:19:26,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:19:26,829 INFO L93 Difference]: Finished difference Result 137 states and 154 transitions. [2021-05-06 09:19:26,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 09:19:26,830 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 4 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 109 [2021-05-06 09:19:26,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:19:26,831 INFO L225 Difference]: With dead ends: 137 [2021-05-06 09:19:26,831 INFO L226 Difference]: Without dead ends: 137 [2021-05-06 09:19:26,831 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 8.5ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-06 09:19:26,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-05-06 09:19:26,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2021-05-06 09:19:26,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 85 states have (on average 1.0823529411764705) internal successors, (92), 86 states have internal predecessors, (92), 32 states have call successors, (32), 20 states have call predecessors, (32), 19 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2021-05-06 09:19:26,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 154 transitions. [2021-05-06 09:19:26,835 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 154 transitions. Word has length 109 [2021-05-06 09:19:26,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:19:26,835 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 154 transitions. [2021-05-06 09:19:26,835 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 4 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-05-06 09:19:26,835 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 154 transitions. [2021-05-06 09:19:26,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-05-06 09:19:26,836 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:19:26,836 INFO L523 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:19:27,049 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-06 09:19:27,049 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:19:27,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:19:27,049 INFO L82 PathProgramCache]: Analyzing trace with hash 1079108237, now seen corresponding path program 5 times [2021-05-06 09:19:27,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:19:27,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845509744] [2021-05-06 09:19:27,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:19:27,055 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:19:27,055 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1069589648] [2021-05-06 09:19:27,055 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:19:27,132 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-05-06 09:19:27,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 09:19:27,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-06 09:19:27,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:19:27,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:27,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:27,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:27,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:27,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:27,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:27,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:27,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:27,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:27,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:27,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:27,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:27,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:27,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:27,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:27,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:27,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:27,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:27,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:27,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:27,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:27,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:27,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:27,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:27,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:27,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:27,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:27,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:27,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:27,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:27,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:27,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:27,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:27,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:27,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:27,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:27,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:27,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:27,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:27,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:27,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:27,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:27,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:27,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:27,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:27,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:27,644 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 61 proven. 10 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2021-05-06 09:19:27,645 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:19:27,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845509744] [2021-05-06 09:19:27,645 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:19:27,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069589648] [2021-05-06 09:19:27,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069589648] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 09:19:27,645 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 09:19:27,645 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 09:19:27,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629805790] [2021-05-06 09:19:27,647 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 09:19:27,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 09:19:27,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 09:19:27,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-06 09:19:27,648 INFO L87 Difference]: Start difference. First operand 137 states and 154 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 6 states have call successors, (18) [2021-05-06 09:19:27,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 09:19:27,951 INFO L93 Difference]: Finished difference Result 129 states and 152 transitions. [2021-05-06 09:19:27,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 09:19:27,952 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 6 states have call successors, (18) Word has length 111 [2021-05-06 09:19:27,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 09:19:27,953 INFO L225 Difference]: With dead ends: 129 [2021-05-06 09:19:27,953 INFO L226 Difference]: Without dead ends: 129 [2021-05-06 09:19:27,953 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 277.6ms TimeCoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2021-05-06 09:19:27,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-05-06 09:19:27,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 112. [2021-05-06 09:19:27,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 70 states have (on average 1.0714285714285714) internal successors, (75), 71 states have internal predecessors, (75), 25 states have call successors, (25), 17 states have call predecessors, (25), 16 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2021-05-06 09:19:27,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 123 transitions. [2021-05-06 09:19:27,956 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 123 transitions. Word has length 111 [2021-05-06 09:19:27,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 09:19:27,956 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 123 transitions. [2021-05-06 09:19:27,956 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 6 states have call successors, (18) [2021-05-06 09:19:27,956 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 123 transitions. [2021-05-06 09:19:27,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-05-06 09:19:27,957 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 09:19:27,957 INFO L523 BasicCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 09:19:28,172 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:19:28,173 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 09:19:28,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 09:19:28,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1747989600, now seen corresponding path program 1 times [2021-05-06 09:19:28,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 09:19:28,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301652954] [2021-05-06 09:19:28,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 09:19:28,179 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 09:19:28,179 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1031525257] [2021-05-06 09:19:28,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 09:19:28,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 09:19:28,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 09:19:28,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 09:19:28,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:28,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:28,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:28,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:28,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:28,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:28,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:28,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:28,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:28,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:28,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:28,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:28,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:28,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:28,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:28,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:28,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:28,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:28,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:28,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:28,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:28,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:28,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:28,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:28,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:28,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:28,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:28,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:28,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:28,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:28,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:28,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:28,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:28,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:28,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:28,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:28,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:28,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:28,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:28,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:28,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:28,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:28,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:28,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:28,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:28,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:28,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:28,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:28,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:28,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:28,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:28,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:28,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:28,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:28,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:28,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:28,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:28,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:28,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:28,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:28,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:28,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:28,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:28,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:28,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:28,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:28,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:28,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:28,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:28,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:28,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:28,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:28,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:28,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:28,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:28,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:28,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:28,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:28,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:28,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:28,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:28,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:28,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:28,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:28,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:28,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:28,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:28,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:28,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:28,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:28,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:28,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:28,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:28,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:19:28,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 09:31:55,838 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 09:31:55,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301652954] [2021-05-06 09:31:55,838 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 09:31:55,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031525257] [2021-05-06 09:31:55,838 WARN L348 FreeRefinementEngine]: Global settings require throwing the following exception [2021-05-06 09:31:56,039 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-06 09:31:56,040 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.UnsupportedOperationException: Size of result too large: 5661211248 xjuncts at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionTir$ExplicitLhsPolynomialRelations.buildDualFiniteJunction(DualJunctionTir.java:652) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionTir$ExplicitLhsPolynomialRelations.buildCorrespondingFiniteJunctionForAntiDer(DualJunctionTir.java:615) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionTir$ExplicitLhsPolynomialRelations.buildBoundConstraint(DualJunctionTir.java:451) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionTir.tryToEliminateConjuncts(DualJunctionTir.java:205) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionTir.tryToEliminateOne(DualJunctionTir.java:160) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionTir.tryExhaustivelyToEliminate(DualJunctionTir.java:125) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionTir.tryToEliminate(DualJunctionTir.java:112) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToEliminateOne(QuantifierPusher.java:869) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyNewEliminationTechniquesExhaustively(QuantifierPusher.java:835) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyDualJunctionEliminationTechniques(QuantifierPusher.java:753) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective2(QuantifierPusher.java:384) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:316) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.convert(QuantifierPusher.java:227) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.cacheConvert(TermTransformer.java:131) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer$Convert.walk(TermTransformer.java:79) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.transform(TermTransformer.java:272) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.eliminate(QuantifierPusher.java:144) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.eliminate(QuantifierPusher.java:166) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.eliminate(QuantifierPusher.java:160) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective2(QuantifierPusher.java:465) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:316) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.convert(QuantifierPusher.java:227) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.cacheConvert(TermTransformer.java:131) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer$Convert.walk(TermTransformer.java:79) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.transform(TermTransformer.java:272) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.eliminate(QuantifierPusher.java:144) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.eliminate(QuantifierPusher.java:166) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.eliminate(QuantifierPusher.java:160) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective2(QuantifierPusher.java:465) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:316) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.convert(QuantifierPusher.java:227) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.cacheConvert(TermTransformer.java:131) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer$Convert.walk(TermTransformer.java:79) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.transform(TermTransformer.java:272) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.eliminate(QuantifierPusher.java:144) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.eliminate(QuantifierPusher.java:166) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.eliminate(QuantifierPusher.java:160) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.doit(QuantifierPusher.java:609) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective2(QuantifierPusher.java:405) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:316) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.convert(QuantifierPusher.java:227) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.cacheConvert(TermTransformer.java:131) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer$Convert.walk(TermTransformer.java:79) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.transform(TermTransformer.java:272) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.eliminate(QuantifierPusher.java:144) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.eliminate(QuantifierPusher.java:166) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.tryToEliminate(PartialQuantifierElimination.java:87) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:246) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:440) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:201) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:299) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:185) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:163) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:248) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:612) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:437) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:69) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:63) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateAllErrorsAtOnce(TraceAbstractionStarter.java:317) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:171) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-05-06 09:31:56,047 INFO L168 Benchmark]: Toolchain (without parser) took 758434.49 ms. Allocated memory was 186.6 MB in the beginning and 4.5 GB in the end (delta: 4.3 GB). Free memory was 152.6 MB in the beginning and 3.2 GB in the end (delta: -3.0 GB). Peak memory consumption was 3.4 GB. Max. memory is 8.0 GB. [2021-05-06 09:31:56,047 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 186.6 MB. Free memory is still 169.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 09:31:56,047 INFO L168 Benchmark]: CACSL2BoogieTranslator took 220.47 ms. Allocated memory is still 186.6 MB. Free memory was 152.4 MB in the beginning and 171.2 MB in the end (delta: -18.8 MB). Peak memory consumption was 15.0 MB. Max. memory is 8.0 GB. [2021-05-06 09:31:56,047 INFO L168 Benchmark]: Boogie Preprocessor took 68.58 ms. Allocated memory is still 186.6 MB. Free memory was 171.2 MB in the beginning and 169.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-06 09:31:56,049 INFO L168 Benchmark]: RCFGBuilder took 319.81 ms. Allocated memory is still 186.6 MB. Free memory was 169.1 MB in the beginning and 153.4 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-05-06 09:31:56,049 INFO L168 Benchmark]: IcfgTransformer took 28.33 ms. Allocated memory is still 186.6 MB. Free memory was 153.4 MB in the beginning and 152.4 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-06 09:31:56,049 INFO L168 Benchmark]: TraceAbstraction took 757789.14 ms. Allocated memory was 186.6 MB in the beginning and 4.5 GB in the end (delta: 4.3 GB). Free memory was 151.8 MB in the beginning and 3.2 GB in the end (delta: -3.0 GB). Peak memory consumption was 3.4 GB. Max. memory is 8.0 GB. [2021-05-06 09:31:56,050 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10 ms. Allocated memory is still 186.6 MB. Free memory is still 169.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 220.47 ms. Allocated memory is still 186.6 MB. Free memory was 152.4 MB in the beginning and 171.2 MB in the end (delta: -18.8 MB). Peak memory consumption was 15.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 68.58 ms. Allocated memory is still 186.6 MB. Free memory was 171.2 MB in the beginning and 169.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 319.81 ms. Allocated memory is still 186.6 MB. Free memory was 169.1 MB in the beginning and 153.4 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * IcfgTransformer took 28.33 ms. Allocated memory is still 186.6 MB. Free memory was 153.4 MB in the beginning and 152.4 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 757789.14 ms. Allocated memory was 186.6 MB in the beginning and 4.5 GB in the end (delta: 4.3 GB). Free memory was 151.8 MB in the beginning and 3.2 GB in the end (delta: -3.0 GB). Peak memory consumption was 3.4 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: UnsupportedOperationException: Size of result too large: 5661211248 xjuncts de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: UnsupportedOperationException: Size of result too large: 5661211248 xjuncts: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionTir$ExplicitLhsPolynomialRelations.buildDualFiniteJunction(DualJunctionTir.java:652) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...