/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/cohendiv-ll_unwindbound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 07:26:12,853 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 07:26:12,855 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 07:26:12,888 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 07:26:12,888 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 07:26:12,890 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 07:26:12,892 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 07:26:12,896 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 07:26:12,898 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 07:26:12,911 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 07:26:12,911 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 07:26:12,913 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 07:26:12,913 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 07:26:12,914 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 07:26:12,915 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 07:26:12,916 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 07:26:12,918 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 07:26:12,919 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 07:26:12,920 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 07:26:12,925 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 07:26:12,925 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 07:26:12,927 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 07:26:12,927 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 07:26:12,929 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 07:26:12,933 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 07:26:12,940 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 07:26:12,941 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 07:26:12,941 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 07:26:12,945 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 07:26:12,958 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 07:26:12,958 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 07:26:12,960 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 07:26:12,960 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 07:26:12,960 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 07:26:12,960 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 07:26:12,960 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 07:26:12,961 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 07:26:12,961 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 07:26:12,961 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 07:26:12,961 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 07:26:12,962 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 07:26:12,962 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 07:26:12,962 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 07:26:12,962 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 07:26:12,962 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 07:26:12,962 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 07:26:12,962 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 07:26:12,962 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 07:26:12,962 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 07:26:12,963 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 07:26:12,963 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 07:26:12,963 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 07:26:13,212 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 07:26:13,244 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 07:26:13,246 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 07:26:13,247 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 07:26:13,248 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 07:26:13,248 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_unwindbound50.c [2021-05-06 07:26:13,300 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ce22d4cc/b82cf0294c9d48a89cf37b824e3af890/FLAGf14ca0dab [2021-05-06 07:26:13,714 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 07:26:13,715 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/cohendiv-ll_unwindbound50.c [2021-05-06 07:26:13,720 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ce22d4cc/b82cf0294c9d48a89cf37b824e3af890/FLAGf14ca0dab [2021-05-06 07:26:14,079 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ce22d4cc/b82cf0294c9d48a89cf37b824e3af890 [2021-05-06 07:26:14,081 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 07:26:14,083 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 07:26:14,087 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 07:26:14,087 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 07:26:14,090 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 07:26:14,091 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 07:26:14" (1/1) ... [2021-05-06 07:26:14,091 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57eb12f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:26:14, skipping insertion in model container [2021-05-06 07:26:14,092 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 07:26:14" (1/1) ... [2021-05-06 07:26:14,099 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 07:26:14,110 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 07:26:14,219 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/cohendiv-ll_unwindbound50.c[576,589] [2021-05-06 07:26:14,236 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 07:26:14,243 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 07:26:14,252 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/cohendiv-ll_unwindbound50.c[576,589] [2021-05-06 07:26:14,269 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 07:26:14,281 INFO L208 MainTranslator]: Completed translation [2021-05-06 07:26:14,281 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:26:14 WrapperNode [2021-05-06 07:26:14,282 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 07:26:14,284 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 07:26:14,284 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 07:26:14,284 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 07:26:14,320 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:26:14" (1/1) ... [2021-05-06 07:26:14,321 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:26:14" (1/1) ... [2021-05-06 07:26:14,342 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:26:14" (1/1) ... [2021-05-06 07:26:14,342 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:26:14" (1/1) ... [2021-05-06 07:26:14,352 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:26:14" (1/1) ... [2021-05-06 07:26:14,356 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:26:14" (1/1) ... [2021-05-06 07:26:14,359 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:26:14" (1/1) ... [2021-05-06 07:26:14,363 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 07:26:14,364 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 07:26:14,364 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 07:26:14,364 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 07:26:14,365 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:26:14" (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 07:26:14,456 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 07:26:14,457 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 07:26:14,457 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 07:26:14,457 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 07:26:14,457 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 07:26:14,457 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 07:26:14,457 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 07:26:14,457 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 07:26:14,457 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 07:26:14,457 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 07:26:14,457 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 07:26:14,457 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 07:26:14,457 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 07:26:14,458 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 07:26:14,458 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 07:26:14,458 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 07:26:14,458 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 07:26:14,458 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 07:26:14,458 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 07:26:14,458 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 07:26:14,694 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 07:26:14,695 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-06 07:26:14,696 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 07:26:14 BoogieIcfgContainer [2021-05-06 07:26:14,696 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 07:26:14,696 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 07:26:14,696 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 07:26:14,697 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 07:26:14,699 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 07:26:14" (1/1) ... [2021-05-06 07:26:14,708 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 07:26:14 BasicIcfg [2021-05-06 07:26:14,724 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 07:26:14,726 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 07:26:14,726 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 07:26:14,728 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 07:26:14,728 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 07:26:14" (1/4) ... [2021-05-06 07:26:14,729 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fb5ba2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 07:26:14, skipping insertion in model container [2021-05-06 07:26:14,729 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 07:26:14" (2/4) ... [2021-05-06 07:26:14,729 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fb5ba2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 07:26:14, skipping insertion in model container [2021-05-06 07:26:14,729 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 07:26:14" (3/4) ... [2021-05-06 07:26:14,729 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fb5ba2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 07:26:14, skipping insertion in model container [2021-05-06 07:26:14,729 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 07:26:14" (4/4) ... [2021-05-06 07:26:14,730 INFO L111 eAbstractionObserver]: Analyzing ICFG cohendiv-ll_unwindbound50.cJordan [2021-05-06 07:26:14,733 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 07:26:14,749 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 07:26:14,760 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 07:26:14,780 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 07:26:14,781 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 07:26:14,781 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 07:26:14,781 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 07:26:14,781 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 07:26:14,781 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 07:26:14,781 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 07:26:14,781 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 07:26:14,796 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 23 states have internal predecessors, (31), 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 07:26:14,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-06 07:26:14,810 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:26:14,821 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 07:26:14,821 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:26:14,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:26:14,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1213541379, now seen corresponding path program 1 times [2021-05-06 07:26:14,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:26:14,831 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956929696] [2021-05-06 07:26:14,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:26:14,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:26:15,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 07:26:15,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:26:15,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 07:26:15,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:26:15,046 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 07:26:15,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:26:15,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956929696] [2021-05-06 07:26:15,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956929696] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:26:15,047 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:26:15,048 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 07:26:15,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631324728] [2021-05-06 07:26:15,051 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 07:26:15,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:26:15,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 07:26:15,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 07:26:15,061 INFO L87 Difference]: Start difference. First operand has 38 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 23 states have internal predecessors, (31), 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 07:26:15,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:26:15,207 INFO L93 Difference]: Finished difference Result 39 states and 48 transitions. [2021-05-06 07:26:15,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 07:26:15,209 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 07:26:15,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:26:15,225 INFO L225 Difference]: With dead ends: 39 [2021-05-06 07:26:15,226 INFO L226 Difference]: Without dead ends: 34 [2021-05-06 07:26:15,227 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 43.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 07:26:15,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-06 07:26:15,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2021-05-06 07:26:15,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 19 states have (on average 1.263157894736842) internal successors, (24), 20 states have internal predecessors, (24), 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 07:26:15,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2021-05-06 07:26:15,255 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 17 [2021-05-06 07:26:15,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:26:15,255 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2021-05-06 07:26:15,256 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 07:26:15,256 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2021-05-06 07:26:15,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-06 07:26:15,257 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:26:15,257 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:26:15,257 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 07:26:15,257 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:26:15,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:26:15,258 INFO L82 PathProgramCache]: Analyzing trace with hash -1202035559, now seen corresponding path program 1 times [2021-05-06 07:26:15,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:26:15,259 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345930981] [2021-05-06 07:26:15,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:26:15,290 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:26:15,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1489991430] [2021-05-06 07:26:15,290 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 07:26:15,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:26:15,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 07:26:15,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:26:15,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:15,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:15,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:15,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:15,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:15,488 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 07:26:15,488 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:26:15,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345930981] [2021-05-06 07:26:15,488 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:26:15,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489991430] [2021-05-06 07:26:15,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489991430] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:26:15,489 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:26:15,489 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 07:26:15,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452231175] [2021-05-06 07:26:15,490 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 07:26:15,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:26:15,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 07:26:15,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 07:26:15,491 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 07:26:15,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:26:15,503 INFO L93 Difference]: Finished difference Result 35 states and 44 transitions. [2021-05-06 07:26:15,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 07:26:15,504 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2021-05-06 07:26:15,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:26:15,505 INFO L225 Difference]: With dead ends: 35 [2021-05-06 07:26:15,505 INFO L226 Difference]: Without dead ends: 35 [2021-05-06 07:26:15,505 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.9ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 07:26:15,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-06 07:26:15,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-06 07:26:15,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 22 states have internal predecessors, (26), 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 07:26:15,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2021-05-06 07:26:15,509 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 18 [2021-05-06 07:26:15,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:26:15,510 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2021-05-06 07:26:15,510 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-06 07:26:15,510 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2021-05-06 07:26:15,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-06 07:26:15,510 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:26:15,510 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:26:15,725 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 07:26:15,725 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:26:15,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:26:15,726 INFO L82 PathProgramCache]: Analyzing trace with hash -1200933292, now seen corresponding path program 1 times [2021-05-06 07:26:15,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:26:15,726 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492929758] [2021-05-06 07:26:15,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:26:15,739 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:26:15,740 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1206373631] [2021-05-06 07:26:15,740 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 07:26:15,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:26:15,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 07:26:15,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:26:15,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:15,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:15,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:15,892 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 07:26:15,893 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:26:15,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492929758] [2021-05-06 07:26:15,893 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:26:15,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206373631] [2021-05-06 07:26:15,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206373631] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:26:15,893 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:26:15,893 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-06 07:26:15,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591221705] [2021-05-06 07:26:15,894 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 07:26:15,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:26:15,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 07:26:15,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 07:26:15,895 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand has 8 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (4), 2 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 07:26:15,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:26:15,986 INFO L93 Difference]: Finished difference Result 43 states and 54 transitions. [2021-05-06 07:26:15,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 07:26:15,987 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (4), 2 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 18 [2021-05-06 07:26:15,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:26:15,988 INFO L225 Difference]: With dead ends: 43 [2021-05-06 07:26:15,988 INFO L226 Difference]: Without dead ends: 43 [2021-05-06 07:26:15,988 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 52.6ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-06 07:26:15,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-06 07:26:15,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2021-05-06 07:26:15,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 26 states have internal predecessors, (29), 11 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 07:26:15,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2021-05-06 07:26:15,994 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 18 [2021-05-06 07:26:15,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:26:15,994 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2021-05-06 07:26:15,994 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (4), 2 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 07:26:15,994 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2021-05-06 07:26:15,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 07:26:15,995 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:26:15,995 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, 1] [2021-05-06 07:26:16,213 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:26:16,214 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:26:16,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:26:16,215 INFO L82 PathProgramCache]: Analyzing trace with hash -944097291, now seen corresponding path program 1 times [2021-05-06 07:26:16,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:26:16,215 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022387868] [2021-05-06 07:26:16,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:26:16,224 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:26:16,224 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [558794619] [2021-05-06 07:26:16,224 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 07:26:16,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:26:16,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 07:26:16,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:26:16,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:16,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:16,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:16,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:16,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:16,411 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 07:26:16,412 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:26:16,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022387868] [2021-05-06 07:26:16,412 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:26:16,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558794619] [2021-05-06 07:26:16,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558794619] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:26:16,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:26:16,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-06 07:26:16,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174060695] [2021-05-06 07:26:16,413 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 07:26:16,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:26:16,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 07:26:16,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 07:26:16,414 INFO L87 Difference]: Start difference. First operand 40 states and 49 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 07:26:16,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:26:16,530 INFO L93 Difference]: Finished difference Result 56 states and 72 transitions. [2021-05-06 07:26:16,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 07:26:16,530 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-06 07:26:16,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:26:16,531 INFO L225 Difference]: With dead ends: 56 [2021-05-06 07:26:16,531 INFO L226 Difference]: Without dead ends: 55 [2021-05-06 07:26:16,532 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 53.9ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-06 07:26:16,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-06 07:26:16,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2021-05-06 07:26:16,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 32 states have (on average 1.21875) internal successors, (39), 33 states have internal predecessors, (39), 16 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-06 07:26:16,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 69 transitions. [2021-05-06 07:26:16,538 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 69 transitions. Word has length 23 [2021-05-06 07:26:16,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:26:16,538 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 69 transitions. [2021-05-06 07:26:16,538 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 07:26:16,538 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 69 transitions. [2021-05-06 07:26:16,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-06 07:26:16,539 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:26:16,539 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, 1, 1, 1, 1] [2021-05-06 07:26:16,761 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:26:16,761 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:26:16,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:26:16,762 INFO L82 PathProgramCache]: Analyzing trace with hash -653220550, now seen corresponding path program 1 times [2021-05-06 07:26:16,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:26:16,762 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144718523] [2021-05-06 07:26:16,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:26:16,771 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:26:16,771 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [844252090] [2021-05-06 07:26:16,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:26:16,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:26:16,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 07:26:16,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:26:16,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:16,944 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 07:26:16,944 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:26:16,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144718523] [2021-05-06 07:26:16,944 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:26:16,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844252090] [2021-05-06 07:26:16,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844252090] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:26:16,944 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:26:16,945 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 07:26:16,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310852174] [2021-05-06 07:26:16,945 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 07:26:16,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:26:16,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 07:26:16,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 07:26:16,946 INFO L87 Difference]: Start difference. First operand 54 states and 69 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-06 07:26:17,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:26:17,003 INFO L93 Difference]: Finished difference Result 81 states and 111 transitions. [2021-05-06 07:26:17,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 07:26:17,003 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 31 [2021-05-06 07:26:17,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:26:17,005 INFO L225 Difference]: With dead ends: 81 [2021-05-06 07:26:17,005 INFO L226 Difference]: Without dead ends: 81 [2021-05-06 07:26:17,005 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.5ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 07:26:17,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-05-06 07:26:17,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 74. [2021-05-06 07:26:17,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 44 states have (on average 1.2727272727272727) internal successors, (56), 46 states have internal predecessors, (56), 23 states have call successors, (23), 7 states have call predecessors, (23), 6 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 07:26:17,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 100 transitions. [2021-05-06 07:26:17,012 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 100 transitions. Word has length 31 [2021-05-06 07:26:17,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:26:17,012 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 100 transitions. [2021-05-06 07:26:17,012 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-06 07:26:17,013 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 100 transitions. [2021-05-06 07:26:17,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-06 07:26:17,013 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:26:17,013 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:26:17,228 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:26:17,228 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:26:17,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:26:17,228 INFO L82 PathProgramCache]: Analyzing trace with hash -830156892, now seen corresponding path program 1 times [2021-05-06 07:26:17,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:26:17,231 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201968737] [2021-05-06 07:26:17,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:26:17,258 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:26:17,258 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2115546902] [2021-05-06 07:26:17,258 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 07:26:17,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:26:17,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 07:26:17,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:26:17,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:17,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:17,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:17,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:17,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:17,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:17,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:17,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:17,482 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 07:26:17,482 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:26:17,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201968737] [2021-05-06 07:26:17,482 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:26:17,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115546902] [2021-05-06 07:26:17,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115546902] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:26:17,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:26:17,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 07:26:17,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500730241] [2021-05-06 07:26:17,483 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 07:26:17,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:26:17,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 07:26:17,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 07:26:17,483 INFO L87 Difference]: Start difference. First operand 74 states and 100 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-06 07:26:17,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:26:17,513 INFO L93 Difference]: Finished difference Result 78 states and 102 transitions. [2021-05-06 07:26:17,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 07:26:17,513 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 34 [2021-05-06 07:26:17,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:26:17,515 INFO L225 Difference]: With dead ends: 78 [2021-05-06 07:26:17,515 INFO L226 Difference]: Without dead ends: 78 [2021-05-06 07:26:17,515 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 10.6ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 07:26:17,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-05-06 07:26:17,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2021-05-06 07:26:17,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 47 states have (on average 1.2340425531914894) internal successors, (58), 49 states have internal predecessors, (58), 23 states have call successors, (23), 8 states have call predecessors, (23), 7 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 07:26:17,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 102 transitions. [2021-05-06 07:26:17,520 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 102 transitions. Word has length 34 [2021-05-06 07:26:17,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:26:17,521 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 102 transitions. [2021-05-06 07:26:17,521 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-06 07:26:17,521 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 102 transitions. [2021-05-06 07:26:17,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-06 07:26:17,521 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:26:17,521 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:26:17,735 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-06 07:26:17,735 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:26:17,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:26:17,736 INFO L82 PathProgramCache]: Analyzing trace with hash -1527688582, now seen corresponding path program 1 times [2021-05-06 07:26:17,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:26:17,736 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122346094] [2021-05-06 07:26:17,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:26:17,743 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:26:17,744 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [391606493] [2021-05-06 07:26:17,744 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 07:26:17,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:26:17,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 07:26:17,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:26:17,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:17,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:17,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:17,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:17,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:17,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:17,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:17,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:17,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:17,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:17,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:17,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:17,953 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 07:26:17,954 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:26:17,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122346094] [2021-05-06 07:26:17,954 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:26:17,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391606493] [2021-05-06 07:26:17,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391606493] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:26:17,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:26:17,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-06 07:26:17,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482285787] [2021-05-06 07:26:17,954 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 07:26:17,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:26:17,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 07:26:17,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 07:26:17,955 INFO L87 Difference]: Start difference. First operand 78 states and 102 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-06 07:26:18,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:26:18,040 INFO L93 Difference]: Finished difference Result 82 states and 105 transitions. [2021-05-06 07:26:18,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 07:26:18,041 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 41 [2021-05-06 07:26:18,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:26:18,042 INFO L225 Difference]: With dead ends: 82 [2021-05-06 07:26:18,042 INFO L226 Difference]: Without dead ends: 82 [2021-05-06 07:26:18,042 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 54.1ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-06 07:26:18,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-05-06 07:26:18,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2021-05-06 07:26:18,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 50 states have (on average 1.22) internal successors, (61), 52 states have internal predecessors, (61), 23 states have call successors, (23), 9 states have call predecessors, (23), 8 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 07:26:18,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 105 transitions. [2021-05-06 07:26:18,047 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 105 transitions. Word has length 41 [2021-05-06 07:26:18,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:26:18,047 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 105 transitions. [2021-05-06 07:26:18,048 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-06 07:26:18,048 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 105 transitions. [2021-05-06 07:26:18,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-06 07:26:18,048 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:26:18,048 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:26:18,253 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:26:18,253 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:26:18,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:26:18,254 INFO L82 PathProgramCache]: Analyzing trace with hash 800232443, now seen corresponding path program 1 times [2021-05-06 07:26:18,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:26:18,254 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778991836] [2021-05-06 07:26:18,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:26:18,261 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:26:18,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [759811766] [2021-05-06 07:26:18,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 07:26:18,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:26:18,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 07:26:18,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:26:18,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:18,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:18,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:18,668 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-06 07:26:18,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:26:18,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778991836] [2021-05-06 07:26:18,668 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:26:18,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759811766] [2021-05-06 07:26:18,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759811766] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:26:18,669 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:26:18,669 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 07:26:18,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577479953] [2021-05-06 07:26:18,670 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 07:26:18,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:26:18,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 07:26:18,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 07:26:18,671 INFO L87 Difference]: Start difference. First operand 82 states and 105 transitions. Second operand has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 07:26:18,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:26:18,811 INFO L93 Difference]: Finished difference Result 86 states and 108 transitions. [2021-05-06 07:26:18,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 07:26:18,812 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2021-05-06 07:26:18,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:26:18,812 INFO L225 Difference]: With dead ends: 86 [2021-05-06 07:26:18,813 INFO L226 Difference]: Without dead ends: 86 [2021-05-06 07:26:18,813 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 98.1ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-06 07:26:18,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-05-06 07:26:18,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2021-05-06 07:26:18,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 53 states have (on average 1.2075471698113207) internal successors, (64), 55 states have internal predecessors, (64), 23 states have call successors, (23), 10 states have call predecessors, (23), 9 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 07:26:18,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 108 transitions. [2021-05-06 07:26:18,818 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 108 transitions. Word has length 47 [2021-05-06 07:26:18,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:26:18,818 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 108 transitions. [2021-05-06 07:26:18,818 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 07:26:18,818 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 108 transitions. [2021-05-06 07:26:18,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-06 07:26:18,819 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:26:18,819 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:26:19,039 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:26:19,039 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:26:19,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:26:19,040 INFO L82 PathProgramCache]: Analyzing trace with hash -1984817020, now seen corresponding path program 1 times [2021-05-06 07:26:19,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:26:19,040 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653223236] [2021-05-06 07:26:19,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:26:19,047 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:26:19,047 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [497138301] [2021-05-06 07:26:19,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 07:26:19,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:26:19,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 07:26:19,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:26:19,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:19,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:19,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:19,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:19,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:19,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:19,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:19,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:19,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:19,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:19,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:19,265 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-06 07:26:19,266 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:26:19,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653223236] [2021-05-06 07:26:19,266 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:26:19,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497138301] [2021-05-06 07:26:19,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497138301] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:26:19,266 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:26:19,266 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 07:26:19,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000013752] [2021-05-06 07:26:19,266 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 07:26:19,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:26:19,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 07:26:19,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 07:26:19,267 INFO L87 Difference]: Start difference. First operand 86 states and 108 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 5 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-06 07:26:19,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:26:19,339 INFO L93 Difference]: Finished difference Result 108 states and 127 transitions. [2021-05-06 07:26:19,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 07:26:19,339 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 5 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 50 [2021-05-06 07:26:19,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:26:19,340 INFO L225 Difference]: With dead ends: 108 [2021-05-06 07:26:19,340 INFO L226 Difference]: Without dead ends: 108 [2021-05-06 07:26:19,341 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 21.9ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-06 07:26:19,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-05-06 07:26:19,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 106. [2021-05-06 07:26:19,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 68 states have (on average 1.161764705882353) internal successors, (79), 71 states have internal predecessors, (79), 24 states have call successors, (24), 14 states have call predecessors, (24), 13 states have return successors, (22), 20 states have call predecessors, (22), 22 states have call successors, (22) [2021-05-06 07:26:19,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 125 transitions. [2021-05-06 07:26:19,346 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 125 transitions. Word has length 50 [2021-05-06 07:26:19,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:26:19,346 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 125 transitions. [2021-05-06 07:26:19,346 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 5 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-06 07:26:19,346 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 125 transitions. [2021-05-06 07:26:19,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-06 07:26:19,347 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:26:19,347 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:26:19,567 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-06 07:26:19,568 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:26:19,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:26:19,568 INFO L82 PathProgramCache]: Analyzing trace with hash 960315114, now seen corresponding path program 1 times [2021-05-06 07:26:19,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:26:19,568 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6862657] [2021-05-06 07:26:19,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:26:19,575 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:26:19,575 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [360604355] [2021-05-06 07:26:19,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 07:26:19,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:26:19,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-06 07:26:19,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:26:19,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:19,844 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-05-06 07:26:19,844 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:26:19,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6862657] [2021-05-06 07:26:19,844 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:26:19,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360604355] [2021-05-06 07:26:19,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360604355] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:26:19,844 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:26:19,844 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 07:26:19,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167805896] [2021-05-06 07:26:19,845 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 07:26:19,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:26:19,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 07:26:19,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-06 07:26:19,845 INFO L87 Difference]: Start difference. First operand 106 states and 125 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-06 07:26:19,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:26:19,977 INFO L93 Difference]: Finished difference Result 132 states and 164 transitions. [2021-05-06 07:26:19,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 07:26:19,977 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 55 [2021-05-06 07:26:19,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:26:19,978 INFO L225 Difference]: With dead ends: 132 [2021-05-06 07:26:19,978 INFO L226 Difference]: Without dead ends: 131 [2021-05-06 07:26:19,979 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 38.7ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-06 07:26:19,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-05-06 07:26:19,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 127. [2021-05-06 07:26:19,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 79 states have (on average 1.1898734177215189) internal successors, (94), 82 states have internal predecessors, (94), 33 states have call successors, (33), 15 states have call predecessors, (33), 14 states have return successors, (31), 29 states have call predecessors, (31), 31 states have call successors, (31) [2021-05-06 07:26:19,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 158 transitions. [2021-05-06 07:26:19,988 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 158 transitions. Word has length 55 [2021-05-06 07:26:19,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:26:19,989 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 158 transitions. [2021-05-06 07:26:19,989 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-06 07:26:19,989 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 158 transitions. [2021-05-06 07:26:19,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-05-06 07:26:19,990 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:26:19,990 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:26:20,208 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:26:20,209 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:26:20,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:26:20,209 INFO L82 PathProgramCache]: Analyzing trace with hash 1119467195, now seen corresponding path program 1 times [2021-05-06 07:26:20,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:26:20,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443804406] [2021-05-06 07:26:20,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:26:20,224 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:26:20,224 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [325143509] [2021-05-06 07:26:20,224 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 07:26:20,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:26:20,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 07:26:20,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:26:20,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:20,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:20,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:20,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:20,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:20,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:20,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:20,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:20,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:20,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:20,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:20,411 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 14 proven. 34 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-06 07:26:20,411 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:26:20,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443804406] [2021-05-06 07:26:20,411 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:26:20,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325143509] [2021-05-06 07:26:20,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325143509] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:26:20,411 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:26:20,411 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 07:26:20,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201046286] [2021-05-06 07:26:20,412 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 07:26:20,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:26:20,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 07:26:20,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 07:26:20,412 INFO L87 Difference]: Start difference. First operand 127 states and 158 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-06 07:26:20,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:26:20,467 INFO L93 Difference]: Finished difference Result 130 states and 161 transitions. [2021-05-06 07:26:20,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 07:26:20,468 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 58 [2021-05-06 07:26:20,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:26:20,469 INFO L225 Difference]: With dead ends: 130 [2021-05-06 07:26:20,469 INFO L226 Difference]: Without dead ends: 130 [2021-05-06 07:26:20,469 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 21.2ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-05-06 07:26:20,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-05-06 07:26:20,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2021-05-06 07:26:20,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 82 states have (on average 1.1829268292682926) internal successors, (97), 84 states have internal predecessors, (97), 33 states have call successors, (33), 15 states have call predecessors, (33), 14 states have return successors, (31), 30 states have call predecessors, (31), 31 states have call successors, (31) [2021-05-06 07:26:20,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 161 transitions. [2021-05-06 07:26:20,474 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 161 transitions. Word has length 58 [2021-05-06 07:26:20,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:26:20,474 INFO L480 AbstractCegarLoop]: Abstraction has 130 states and 161 transitions. [2021-05-06 07:26:20,474 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-06 07:26:20,474 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 161 transitions. [2021-05-06 07:26:20,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-05-06 07:26:20,475 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:26:20,475 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:26:20,694 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:26:20,694 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:26:20,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:26:20,694 INFO L82 PathProgramCache]: Analyzing trace with hash -469414513, now seen corresponding path program 1 times [2021-05-06 07:26:20,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:26:20,694 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284232097] [2021-05-06 07:26:20,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:26:20,701 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:26:20,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [77407054] [2021-05-06 07:26:20,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 07:26:20,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:26:20,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-06 07:26:20,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:26:20,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:20,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:20,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:20,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:20,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:20,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:20,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:20,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:20,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:20,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:20,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:20,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:20,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:20,903 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-05-06 07:26:20,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:26:20,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284232097] [2021-05-06 07:26:20,903 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:26:20,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77407054] [2021-05-06 07:26:20,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77407054] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 07:26:20,903 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 07:26:20,903 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 07:26:20,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430051366] [2021-05-06 07:26:20,904 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 07:26:20,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:26:20,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 07:26:20,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 07:26:20,904 INFO L87 Difference]: Start difference. First operand 130 states and 161 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 07:26:20,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:26:20,976 INFO L93 Difference]: Finished difference Result 129 states and 154 transitions. [2021-05-06 07:26:20,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 07:26:20,976 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 66 [2021-05-06 07:26:20,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:26:20,977 INFO L225 Difference]: With dead ends: 129 [2021-05-06 07:26:20,977 INFO L226 Difference]: Without dead ends: 119 [2021-05-06 07:26:20,977 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 19.2ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 07:26:20,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-05-06 07:26:20,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 112. [2021-05-06 07:26:20,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 72 states have (on average 1.1527777777777777) internal successors, (83), 74 states have internal predecessors, (83), 26 states have call successors, (26), 14 states have call predecessors, (26), 13 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2021-05-06 07:26:20,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 133 transitions. [2021-05-06 07:26:20,982 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 133 transitions. Word has length 66 [2021-05-06 07:26:20,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:26:20,983 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 133 transitions. [2021-05-06 07:26:20,983 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 07:26:20,983 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 133 transitions. [2021-05-06 07:26:20,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-05-06 07:26:20,983 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:26:20,983 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:26:21,199 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-06 07:26:21,199 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:26:21,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:26:21,199 INFO L82 PathProgramCache]: Analyzing trace with hash -1669598821, now seen corresponding path program 1 times [2021-05-06 07:26:21,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:26:21,200 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854537213] [2021-05-06 07:26:21,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:26:21,205 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:26:21,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1777409150] [2021-05-06 07:26:21,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 07:26:21,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:26:21,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 07:26:21,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:26:21,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:21,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:21,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:21,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:21,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:21,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:21,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:21,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:21,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:21,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:21,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:21,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:21,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:21,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:21,451 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 18 proven. 112 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-06 07:26:21,452 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:26:21,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854537213] [2021-05-06 07:26:21,452 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:26:21,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777409150] [2021-05-06 07:26:21,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777409150] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:26:21,452 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:26:21,452 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 07:26:21,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590549567] [2021-05-06 07:26:21,452 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 07:26:21,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:26:21,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 07:26:21,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-06 07:26:21,453 INFO L87 Difference]: Start difference. First operand 112 states and 133 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 6 states have call successors, (13), 6 states have call predecessors, (13), 4 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) [2021-05-06 07:26:21,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:26:21,522 INFO L93 Difference]: Finished difference Result 134 states and 157 transitions. [2021-05-06 07:26:21,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 07:26:21,523 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 6 states have call successors, (13), 6 states have call predecessors, (13), 4 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) Word has length 74 [2021-05-06 07:26:21,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:26:21,523 INFO L225 Difference]: With dead ends: 134 [2021-05-06 07:26:21,524 INFO L226 Difference]: Without dead ends: 134 [2021-05-06 07:26:21,524 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 26.7ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-06 07:26:21,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-05-06 07:26:21,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 132. [2021-05-06 07:26:21,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 85 states have (on average 1.1411764705882352) internal successors, (97), 88 states have internal predecessors, (97), 30 states have call successors, (30), 17 states have call predecessors, (30), 16 states have return successors, (28), 26 states have call predecessors, (28), 28 states have call successors, (28) [2021-05-06 07:26:21,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 155 transitions. [2021-05-06 07:26:21,528 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 155 transitions. Word has length 74 [2021-05-06 07:26:21,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:26:21,528 INFO L480 AbstractCegarLoop]: Abstraction has 132 states and 155 transitions. [2021-05-06 07:26:21,528 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 6 states have internal predecessors, (32), 6 states have call successors, (13), 6 states have call predecessors, (13), 4 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) [2021-05-06 07:26:21,529 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 155 transitions. [2021-05-06 07:26:21,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-05-06 07:26:21,529 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:26:21,529 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 2, 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, 1, 1] [2021-05-06 07:26:21,745 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-06 07:26:21,745 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:26:21,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:26:21,745 INFO L82 PathProgramCache]: Analyzing trace with hash -286098381, now seen corresponding path program 1 times [2021-05-06 07:26:21,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:26:21,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159984737] [2021-05-06 07:26:21,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:26:21,752 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:26:21,752 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2064475056] [2021-05-06 07:26:21,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 07:26:22,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:26:22,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-06 07:26:22,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:26:22,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:22,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:22,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:22,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:22,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:22,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:22,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:22,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:22,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:22,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:22,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:22,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:22,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:22,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:22,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:22,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:22,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:22,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:22,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:22,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:22,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:22,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:22,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:22,411 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 20 proven. 10 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-05-06 07:26:22,411 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:26:22,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159984737] [2021-05-06 07:26:22,411 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:26:22,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064475056] [2021-05-06 07:26:22,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064475056] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:26:22,411 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:26:22,411 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 07:26:22,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858141453] [2021-05-06 07:26:22,412 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 07:26:22,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:26:22,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 07:26:22,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-06 07:26:22,412 INFO L87 Difference]: Start difference. First operand 132 states and 155 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 9 states have internal predecessors, (26), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-06 07:26:22,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:26:22,668 INFO L93 Difference]: Finished difference Result 163 states and 198 transitions. [2021-05-06 07:26:22,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 07:26:22,668 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 9 states have internal predecessors, (26), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) Word has length 79 [2021-05-06 07:26:22,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:26:22,669 INFO L225 Difference]: With dead ends: 163 [2021-05-06 07:26:22,669 INFO L226 Difference]: Without dead ends: 162 [2021-05-06 07:26:22,669 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 89.4ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-06 07:26:22,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-05-06 07:26:22,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 157. [2021-05-06 07:26:22,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 99 states have (on average 1.1616161616161615) internal successors, (115), 102 states have internal predecessors, (115), 39 states have call successors, (39), 19 states have call predecessors, (39), 18 states have return successors, (37), 35 states have call predecessors, (37), 37 states have call successors, (37) [2021-05-06 07:26:22,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 191 transitions. [2021-05-06 07:26:22,674 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 191 transitions. Word has length 79 [2021-05-06 07:26:22,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:26:22,675 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 191 transitions. [2021-05-06 07:26:22,675 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 9 states have internal predecessors, (26), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-06 07:26:22,675 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 191 transitions. [2021-05-06 07:26:22,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-05-06 07:26:22,675 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:26:22,675 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 3, 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, 1, 1, 1, 1] [2021-05-06 07:26:22,886 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-06 07:26:22,886 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:26:22,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:26:22,887 INFO L82 PathProgramCache]: Analyzing trace with hash -792688430, now seen corresponding path program 2 times [2021-05-06 07:26:22,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:26:22,887 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717084465] [2021-05-06 07:26:22,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:26:22,899 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:26:22,899 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [166808022] [2021-05-06 07:26:22,899 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 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 07:26:22,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 07:26:22,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 07:26:22,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 07:26:22,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:26:22,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:22,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:22,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:23,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:23,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:23,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:23,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:23,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:23,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:23,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:23,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:23,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:23,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:23,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:23,134 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 22 proven. 140 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-05-06 07:26:23,134 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:26:23,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717084465] [2021-05-06 07:26:23,135 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:26:23,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166808022] [2021-05-06 07:26:23,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166808022] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:26:23,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:26:23,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 07:26:23,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280635288] [2021-05-06 07:26:23,135 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 07:26:23,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:26:23,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 07:26:23,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-06 07:26:23,136 INFO L87 Difference]: Start difference. First operand 157 states and 191 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 6 states have call successors, (14), 6 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-06 07:26:23,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:26:23,212 INFO L93 Difference]: Finished difference Result 160 states and 194 transitions. [2021-05-06 07:26:23,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 07:26:23,212 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 6 states have call successors, (14), 6 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) Word has length 82 [2021-05-06 07:26:23,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:26:23,213 INFO L225 Difference]: With dead ends: 160 [2021-05-06 07:26:23,213 INFO L226 Difference]: Without dead ends: 160 [2021-05-06 07:26:23,213 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 34.0ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-05-06 07:26:23,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-05-06 07:26:23,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2021-05-06 07:26:23,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 102 states have (on average 1.1568627450980393) internal successors, (118), 104 states have internal predecessors, (118), 39 states have call successors, (39), 19 states have call predecessors, (39), 18 states have return successors, (37), 36 states have call predecessors, (37), 37 states have call successors, (37) [2021-05-06 07:26:23,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 194 transitions. [2021-05-06 07:26:23,218 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 194 transitions. Word has length 82 [2021-05-06 07:26:23,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:26:23,218 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 194 transitions. [2021-05-06 07:26:23,218 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 6 states have call successors, (14), 6 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-06 07:26:23,218 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 194 transitions. [2021-05-06 07:26:23,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-05-06 07:26:23,218 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:26:23,219 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 2, 2, 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, 1, 1] [2021-05-06 07:26:23,425 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:26:23,425 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:26:23,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:26:23,425 INFO L82 PathProgramCache]: Analyzing trace with hash -2126505818, now seen corresponding path program 1 times [2021-05-06 07:26:23,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:26:23,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013123508] [2021-05-06 07:26:23,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:26:23,430 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:26:23,430 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [736332223] [2021-05-06 07:26:23,430 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 07:26:23,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 07:26:23,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 07:26:23,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:26:23,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:23,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:23,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:23,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:23,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:23,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:23,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:23,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:23,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:23,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:23,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:23,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:23,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:23,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:23,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:23,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:23,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:23,684 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 27 proven. 191 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-05-06 07:26:23,685 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:26:23,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013123508] [2021-05-06 07:26:23,685 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:26:23,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736332223] [2021-05-06 07:26:23,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736332223] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:26:23,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:26:23,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 07:26:23,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736628831] [2021-05-06 07:26:23,685 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 07:26:23,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:26:23,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 07:26:23,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-06 07:26:23,686 INFO L87 Difference]: Start difference. First operand 160 states and 194 transitions. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 states have internal predecessors, (41), 7 states have call successors, (15), 7 states have call predecessors, (15), 5 states have return successors, (13), 5 states have call predecessors, (13), 6 states have call successors, (13) [2021-05-06 07:26:23,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:26:23,812 INFO L93 Difference]: Finished difference Result 186 states and 220 transitions. [2021-05-06 07:26:23,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 07:26:23,813 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 states have internal predecessors, (41), 7 states have call successors, (15), 7 states have call predecessors, (15), 5 states have return successors, (13), 5 states have call predecessors, (13), 6 states have call successors, (13) Word has length 90 [2021-05-06 07:26:23,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:26:23,814 INFO L225 Difference]: With dead ends: 186 [2021-05-06 07:26:23,814 INFO L226 Difference]: Without dead ends: 186 [2021-05-06 07:26:23,814 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 48.2ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-05-06 07:26:23,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-05-06 07:26:23,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 184. [2021-05-06 07:26:23,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 118 states have (on average 1.1355932203389831) internal successors, (134), 120 states have internal predecessors, (134), 43 states have call successors, (43), 23 states have call predecessors, (43), 22 states have return successors, (41), 40 states have call predecessors, (41), 41 states have call successors, (41) [2021-05-06 07:26:23,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 218 transitions. [2021-05-06 07:26:23,819 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 218 transitions. Word has length 90 [2021-05-06 07:26:23,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:26:23,819 INFO L480 AbstractCegarLoop]: Abstraction has 184 states and 218 transitions. [2021-05-06 07:26:23,819 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 states have internal predecessors, (41), 7 states have call successors, (15), 7 states have call predecessors, (15), 5 states have return successors, (13), 5 states have call predecessors, (13), 6 states have call successors, (13) [2021-05-06 07:26:23,819 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 218 transitions. [2021-05-06 07:26:23,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-05-06 07:26:23,820 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:26:23,820 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 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, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:26:24,038 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-06 07:26:24,038 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:26:24,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:26:24,038 INFO L82 PathProgramCache]: Analyzing trace with hash -169757262, now seen corresponding path program 2 times [2021-05-06 07:26:24,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:26:24,039 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273116885] [2021-05-06 07:26:24,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:26:24,044 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:26:24,044 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [182180318] [2021-05-06 07:26:24,044 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:26:24,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 07:26:24,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 07:26:24,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 07:26:24,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:26:24,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:24,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:24,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:24,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:24,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:24,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:24,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:24,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:24,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:24,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:24,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:24,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:24,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:24,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:24,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:24,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:24,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:24,329 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 26 proven. 270 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-05-06 07:26:24,330 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:26:24,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273116885] [2021-05-06 07:26:24,330 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:26:24,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182180318] [2021-05-06 07:26:24,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182180318] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:26:24,330 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:26:24,330 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 07:26:24,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855877118] [2021-05-06 07:26:24,330 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 07:26:24,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:26:24,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 07:26:24,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-06 07:26:24,331 INFO L87 Difference]: Start difference. First operand 184 states and 218 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 7 states have call successors, (17), 7 states have call predecessors, (17), 5 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) [2021-05-06 07:26:24,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:26:24,432 INFO L93 Difference]: Finished difference Result 187 states and 221 transitions. [2021-05-06 07:26:24,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 07:26:24,433 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 7 states have call successors, (17), 7 states have call predecessors, (17), 5 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) Word has length 98 [2021-05-06 07:26:24,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:26:24,434 INFO L225 Difference]: With dead ends: 187 [2021-05-06 07:26:24,434 INFO L226 Difference]: Without dead ends: 187 [2021-05-06 07:26:24,434 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 40.5ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-05-06 07:26:24,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-05-06 07:26:24,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2021-05-06 07:26:24,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 121 states have (on average 1.1322314049586777) internal successors, (137), 123 states have internal predecessors, (137), 43 states have call successors, (43), 23 states have call predecessors, (43), 22 states have return successors, (41), 40 states have call predecessors, (41), 41 states have call successors, (41) [2021-05-06 07:26:24,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 221 transitions. [2021-05-06 07:26:24,439 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 221 transitions. Word has length 98 [2021-05-06 07:26:24,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:26:24,439 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 221 transitions. [2021-05-06 07:26:24,439 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 7 states have call successors, (17), 7 states have call predecessors, (17), 5 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) [2021-05-06 07:26:24,439 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 221 transitions. [2021-05-06 07:26:24,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-05-06 07:26:24,440 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:26:24,440 INFO L523 BasicCegarLoop]: trace histogram [15, 14, 14, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:26:24,655 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-06 07:26:24,655 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:26:24,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:26:24,655 INFO L82 PathProgramCache]: Analyzing trace with hash 1237757564, now seen corresponding path program 2 times [2021-05-06 07:26:24,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:26:24,656 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045304265] [2021-05-06 07:26:24,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:26:24,661 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:26:24,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [347862366] [2021-05-06 07:26:24,661 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:26:24,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 07:26:24,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 07:26:24,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-06 07:26:24,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:26:25,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:25,012 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 28 proven. 24 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2021-05-06 07:26:25,013 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:26:25,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045304265] [2021-05-06 07:26:25,013 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:26:25,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347862366] [2021-05-06 07:26:25,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347862366] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:26:25,013 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:26:25,013 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 07:26:25,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989976099] [2021-05-06 07:26:25,014 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 07:26:25,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:26:25,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 07:26:25,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-06 07:26:25,014 INFO L87 Difference]: Start difference. First operand 187 states and 221 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2021-05-06 07:26:25,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:26:25,212 INFO L93 Difference]: Finished difference Result 217 states and 263 transitions. [2021-05-06 07:26:25,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 07:26:25,213 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 103 [2021-05-06 07:26:25,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:26:25,214 INFO L225 Difference]: With dead ends: 217 [2021-05-06 07:26:25,214 INFO L226 Difference]: Without dead ends: 216 [2021-05-06 07:26:25,214 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 63.1ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-06 07:26:25,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-05-06 07:26:25,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 212. [2021-05-06 07:26:25,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 135 states have (on average 1.1481481481481481) internal successors, (155), 137 states have internal predecessors, (155), 52 states have call successors, (52), 25 states have call predecessors, (52), 24 states have return successors, (50), 49 states have call predecessors, (50), 50 states have call successors, (50) [2021-05-06 07:26:25,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 257 transitions. [2021-05-06 07:26:25,220 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 257 transitions. Word has length 103 [2021-05-06 07:26:25,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:26:25,220 INFO L480 AbstractCegarLoop]: Abstraction has 212 states and 257 transitions. [2021-05-06 07:26:25,221 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2021-05-06 07:26:25,221 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 257 transitions. [2021-05-06 07:26:25,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-05-06 07:26:25,221 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:26:25,221 INFO L523 BasicCegarLoop]: trace histogram [15, 14, 14, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 07:26:25,439 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-06 07:26:25,439 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:26:25,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:26:25,439 INFO L82 PathProgramCache]: Analyzing trace with hash 2014256518, now seen corresponding path program 3 times [2021-05-06 07:26:25,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:26:25,440 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518625620] [2021-05-06 07:26:25,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:26:25,444 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:26:25,444 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1291913292] [2021-05-06 07:26:25,445 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:26:25,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-06 07:26:25,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 07:26:25,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-06 07:26:25,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:26:25,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:25,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:25,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:25,796 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 86 proven. 36 refuted. 0 times theorem prover too weak. 298 trivial. 0 not checked. [2021-05-06 07:26:25,796 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:26:25,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518625620] [2021-05-06 07:26:25,796 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:26:25,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291913292] [2021-05-06 07:26:25,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291913292] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:26:25,796 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:26:25,796 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 07:26:25,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845343762] [2021-05-06 07:26:25,798 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 07:26:25,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:26:25,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 07:26:25,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-06 07:26:25,798 INFO L87 Difference]: Start difference. First operand 212 states and 257 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-06 07:26:26,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:26:26,199 INFO L93 Difference]: Finished difference Result 234 states and 287 transitions. [2021-05-06 07:26:26,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 07:26:26,199 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) Word has length 106 [2021-05-06 07:26:26,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:26:26,202 INFO L225 Difference]: With dead ends: 234 [2021-05-06 07:26:26,203 INFO L226 Difference]: Without dead ends: 225 [2021-05-06 07:26:26,203 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 124.8ms TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-05-06 07:26:26,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-05-06 07:26:26,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 194. [2021-05-06 07:26:26,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 126 states have (on average 1.0952380952380953) internal successors, (138), 129 states have internal predecessors, (138), 43 states have call successors, (43), 25 states have call predecessors, (43), 24 states have return successors, (41), 39 states have call predecessors, (41), 41 states have call successors, (41) [2021-05-06 07:26:26,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 222 transitions. [2021-05-06 07:26:26,211 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 222 transitions. Word has length 106 [2021-05-06 07:26:26,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:26:26,212 INFO L480 AbstractCegarLoop]: Abstraction has 194 states and 222 transitions. [2021-05-06 07:26:26,212 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-06 07:26:26,212 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 222 transitions. [2021-05-06 07:26:26,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-05-06 07:26:26,213 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:26:26,214 INFO L523 BasicCegarLoop]: trace histogram [16, 15, 15, 4, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-05-06 07:26:26,431 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:26:26,431 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:26:26,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:26:26,432 INFO L82 PathProgramCache]: Analyzing trace with hash 46832061, now seen corresponding path program 2 times [2021-05-06 07:26:26,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:26:26,432 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940329602] [2021-05-06 07:26:26,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:26:26,439 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:26:26,439 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [961455433] [2021-05-06 07:26:26,439 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:26:26,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 07:26:26,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 07:26:26,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-06 07:26:26,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:26:26,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:26,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:26,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:26,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:26,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:26,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:26,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:26,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:26,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:26,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:26,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:26,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:26,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:26,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:26,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:26,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:26,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:26,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:26,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:26,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:26,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:26,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:26,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:26,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:26,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:26,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:26,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:26,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:26,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:26,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:26,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:26,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:26,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:26,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:26,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:26,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:26,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:26,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:26,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:26,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:26,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:26,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:26,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:26,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:26,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:26,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:26,806 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 102 proven. 18 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2021-05-06 07:26:26,806 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 07:26:26,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940329602] [2021-05-06 07:26:26,807 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 07:26:26,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961455433] [2021-05-06 07:26:26,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961455433] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 07:26:26,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 07:26:26,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 07:26:26,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654756374] [2021-05-06 07:26:26,808 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 07:26:26,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 07:26:26,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 07:26:26,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 07:26:26,809 INFO L87 Difference]: Start difference. First operand 194 states and 222 transitions. Second operand has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 6 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2021-05-06 07:26:26,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 07:26:26,959 INFO L93 Difference]: Finished difference Result 226 states and 266 transitions. [2021-05-06 07:26:26,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 07:26:26,959 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 6 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) Word has length 114 [2021-05-06 07:26:26,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 07:26:26,960 INFO L225 Difference]: With dead ends: 226 [2021-05-06 07:26:26,960 INFO L226 Difference]: Without dead ends: 193 [2021-05-06 07:26:26,961 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 67.6ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-05-06 07:26:26,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-05-06 07:26:26,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 179. [2021-05-06 07:26:26,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 116 states have (on average 1.103448275862069) internal successors, (128), 120 states have internal predecessors, (128), 40 states have call successors, (40), 23 states have call predecessors, (40), 22 states have return successors, (37), 35 states have call predecessors, (37), 37 states have call successors, (37) [2021-05-06 07:26:26,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 205 transitions. [2021-05-06 07:26:26,965 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 205 transitions. Word has length 114 [2021-05-06 07:26:26,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 07:26:26,965 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 205 transitions. [2021-05-06 07:26:26,965 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 6 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2021-05-06 07:26:26,965 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 205 transitions. [2021-05-06 07:26:26,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-05-06 07:26:26,966 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 07:26:26,966 INFO L523 BasicCegarLoop]: trace histogram [18, 17, 17, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 07:26:27,184 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:26:27,184 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 07:26:27,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 07:26:27,185 INFO L82 PathProgramCache]: Analyzing trace with hash -1953340215, now seen corresponding path program 4 times [2021-05-06 07:26:27,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 07:26:27,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627880722] [2021-05-06 07:26:27,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 07:26:27,190 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 07:26:27,190 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [554689242] [2021-05-06 07:26:27,190 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 07:26:27,283 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 07:26:27,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 07:26:27,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-06 07:26:27,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 07:26:27,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:27,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:27,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:27,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:27,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:27,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:27,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:27,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:27,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:27,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:27,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:27,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:27,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:27,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:27,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:27,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:27,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:27,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:27,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:27,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:27,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:27,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:27,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:27,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:28,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 07:26:28,094 WARN L159 QuantifierPusher]: Ignoring assumption.